/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/misc-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:50:44,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:50:44,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:50:44,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:50:44,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 19:50:44,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 19:50:44,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 19:50:44,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 19:50:44,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 19:50:44,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 19:50:44,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 19:50:44,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 19:50:44,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 19:50:44,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 19:50:44,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 19:50:44,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 19:50:44,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 19:50:44,554 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 19:50:44,590 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:50:44,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:50:44,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:50:44,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:50:44,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:50:44,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:50:44,593 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:50:44,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:50:44,594 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:50:44,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:50:44,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:50:44,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:50:44,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:50:44,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:50:44,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:50:44,596 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:50:44,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:50:44,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:50:44,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:50:44,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:50:44,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:50:44,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:50:44,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:50:44,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:50:44,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:50:44,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:50:44,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:50:44,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:50:44,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:50:44,598 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:50:44,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:50:44,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:50:44,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:50:44,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:50:44,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:50:44,926 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:50:44,929 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:50:44,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl [2021-07-13 19:50:44,930 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl' [2021-07-13 19:50:44,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:50:44,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:50:44,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:50:44,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:50:44,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:50:44,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:50:44" (1/1) ... [2021-07-13 19:50:44,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:50:44" (1/1) ... [2021-07-13 19:50:44,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:50:44,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:50:44,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:50:44,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:50:44,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:50:44" (1/1) ... [2021-07-13 19:50:44,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:50:44" (1/1) ... [2021-07-13 19:50:45,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:50:44" (1/1) ... [2021-07-13 19:50:45,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:50:44" (1/1) ... [2021-07-13 19:50:45,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:50:44" (1/1) ... [2021-07-13 19:50:45,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:50:44" (1/1) ... [2021-07-13 19:50:45,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:50:44" (1/1) ... [2021-07-13 19:50:45,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:50:45,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:50:45,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:50:45,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:50:45,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:50:44" (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 19:50:45,093 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:50:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:50:45,094 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:50:45,094 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:50:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:50:45,094 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:50:45,095 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:50:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:50:45,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:50:45,096 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 19:50:45,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:50:45,257 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:50:45,259 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:50:45 BoogieIcfgContainer [2021-07-13 19:50:45,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:50:45,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:50:45,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:50:45,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:50:45,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:50:44" (1/2) ... [2021-07-13 19:50:45,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e51d34 and model type misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:50:45, skipping insertion in model container [2021-07-13 19:50:45,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:50:45" (2/2) ... [2021-07-13 19:50:45,265 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-1.wvr.bpl [2021-07-13 19:50:45,286 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:50:45,286 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:50:45,286 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:50:45,287 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:50:45,351 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:50:45,372 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:50:45,388 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:50:45,388 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:50:45,388 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:50:45,388 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:50:45,388 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:50:45,388 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:50:45,389 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:50:45,389 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:50:45,397 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 31 transitions, 78 flow [2021-07-13 19:50:45,413 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 19:50:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 19:50:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:50:45,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:45,423 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:45,423 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:45,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:45,428 INFO L82 PathProgramCache]: Analyzing trace with hash -884848578, now seen corresponding path program 1 times [2021-07-13 19:50:45,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:45,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408679445] [2021-07-13 19:50:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:45,630 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 19:50:45,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:45,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408679445] [2021-07-13 19:50:45,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408679445] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:50:45,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:50:45,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:50:45,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073796772] [2021-07-13 19:50:45,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:50:45,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:45,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:50:45,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:50:45,648 INFO L87 Difference]: Start difference. First operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 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 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 19:50:45,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:45,821 INFO L93 Difference]: Finished difference Result 299 states and 680 transitions. [2021-07-13 19:50:45,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:50:45,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-07-13 19:50:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:45,833 INFO L225 Difference]: With dead ends: 299 [2021-07-13 19:50:45,833 INFO L226 Difference]: Without dead ends: 286 [2021-07-13 19:50:45,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:50:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-13 19:50:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 116. [2021-07-13 19:50:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 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 19:50:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-07-13 19:50:45,874 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 13 [2021-07-13 19:50:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:45,874 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-07-13 19:50:45,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 19:50:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-07-13 19:50:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:50:45,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:45,876 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:45,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:50:45,876 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:45,877 INFO L82 PathProgramCache]: Analyzing trace with hash 961813113, now seen corresponding path program 1 times [2021-07-13 19:50:45,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:45,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373580610] [2021-07-13 19:50:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:45,917 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 19:50:45,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:45,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373580610] [2021-07-13 19:50:45,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373580610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:45,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242856804] [2021-07-13 19:50:45,918 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 19:50:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:45,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:50:45,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:46,095 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 19:50:46,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242856804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:46,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:46,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 19:50:46,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395099106] [2021-07-13 19:50:46,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:50:46,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:50:46,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:50:46,098 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:46,197 INFO L93 Difference]: Finished difference Result 284 states and 599 transitions. [2021-07-13 19:50:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:50:46,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:50:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:46,205 INFO L225 Difference]: With dead ends: 284 [2021-07-13 19:50:46,205 INFO L226 Difference]: Without dead ends: 284 [2021-07-13 19:50:46,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:50:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-13 19:50:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 124. [2021-07-13 19:50:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 19:50:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2021-07-13 19:50:46,230 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 17 [2021-07-13 19:50:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:46,230 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2021-07-13 19:50:46,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2021-07-13 19:50:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:50:46,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:46,232 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:46,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:50:46,433 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:46,433 INFO L82 PathProgramCache]: Analyzing trace with hash 713419811, now seen corresponding path program 1 times [2021-07-13 19:50:46,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:46,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772327115] [2021-07-13 19:50:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:46,497 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 19:50:46,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:46,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772327115] [2021-07-13 19:50:46,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772327115] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:50:46,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:50:46,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:50:46,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482281055] [2021-07-13 19:50:46,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:50:46,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:46,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:50:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:50:46,500 INFO L87 Difference]: Start difference. First operand 124 states and 267 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 19:50:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:46,557 INFO L93 Difference]: Finished difference Result 166 states and 354 transitions. [2021-07-13 19:50:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:50:46,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-07-13 19:50:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:46,559 INFO L225 Difference]: With dead ends: 166 [2021-07-13 19:50:46,559 INFO L226 Difference]: Without dead ends: 156 [2021-07-13 19:50:46,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:50:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-13 19:50:46,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 121. [2021-07-13 19:50:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 19:50:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-07-13 19:50:46,565 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 17 [2021-07-13 19:50:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:46,566 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-07-13 19:50:46,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 19:50:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-07-13 19:50:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:50:46,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:46,567 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:46,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:50:46,568 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:46,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2033378241, now seen corresponding path program 2 times [2021-07-13 19:50:46,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:46,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189825169] [2021-07-13 19:50:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:46,631 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 19:50:46,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:46,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189825169] [2021-07-13 19:50:46,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189825169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:46,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83962338] [2021-07-13 19:50:46,632 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 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 19:50:46,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:46,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:46,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:50:46,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:46,742 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 19:50:46,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83962338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:46,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:46,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-13 19:50:46,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183396726] [2021-07-13 19:50:46,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:50:46,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:46,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:50:46,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:50:46,744 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:46,857 INFO L93 Difference]: Finished difference Result 242 states and 545 transitions. [2021-07-13 19:50:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:50:46,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:50:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:46,859 INFO L225 Difference]: With dead ends: 242 [2021-07-13 19:50:46,859 INFO L226 Difference]: Without dead ends: 242 [2021-07-13 19:50:46,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:50:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-13 19:50:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 125. [2021-07-13 19:50:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 19:50:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-07-13 19:50:46,874 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 17 [2021-07-13 19:50:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:46,875 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-07-13 19:50:46,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-07-13 19:50:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:50:46,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:46,878 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] [2021-07-13 19:50:47,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:47,097 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:47,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:47,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1164039970, now seen corresponding path program 1 times [2021-07-13 19:50:47,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:47,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928898737] [2021-07-13 19:50:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:47,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:47,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928898737] [2021-07-13 19:50:47,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928898737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:47,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199200258] [2021-07-13 19:50:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:47,497 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 19:50:47,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:47,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:47,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:47,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-07-13 19:50:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:47,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199200258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:47,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:47,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-07-13 19:50:47,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372930397] [2021-07-13 19:50:47,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:47,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:47,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:47,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:47,548 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:47,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:47,815 INFO L93 Difference]: Finished difference Result 441 states and 1008 transitions. [2021-07-13 19:50:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:47,816 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:50:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:47,819 INFO L225 Difference]: With dead ends: 441 [2021-07-13 19:50:47,820 INFO L226 Difference]: Without dead ends: 431 [2021-07-13 19:50:47,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:50:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-07-13 19:50:47,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 191. [2021-07-13 19:50:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 19:50:47,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-07-13 19:50:47,832 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 21 [2021-07-13 19:50:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:47,833 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-07-13 19:50:47,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-07-13 19:50:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:50:47,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:47,834 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] [2021-07-13 19:50:48,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:48,049 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:48,050 INFO L82 PathProgramCache]: Analyzing trace with hash 501161696, now seen corresponding path program 2 times [2021-07-13 19:50:48,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:48,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944930358] [2021-07-13 19:50:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:48,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:48,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944930358] [2021-07-13 19:50:48,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944930358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:48,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606665314] [2021-07-13 19:50:48,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:48,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:48,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:48,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:48,328 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 15 treesize of output 11 [2021-07-13 19:50:48,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:48,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:48,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:48,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-07-13 19:50:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:48,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606665314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:48,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:48,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-07-13 19:50:48,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236587744] [2021-07-13 19:50:48,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:48,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:48,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:48,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:48,411 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 19:50:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:48,648 INFO L93 Difference]: Finished difference Result 432 states and 992 transitions. [2021-07-13 19:50:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:48,648 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 21 [2021-07-13 19:50:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:48,651 INFO L225 Difference]: With dead ends: 432 [2021-07-13 19:50:48,651 INFO L226 Difference]: Without dead ends: 423 [2021-07-13 19:50:48,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:50:48,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-07-13 19:50:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 202. [2021-07-13 19:50:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1940298507462686) internal successors, (441), 201 states have internal predecessors, (441), 0 states have call successors, (0), 0 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 19:50:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 441 transitions. [2021-07-13 19:50:48,659 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 441 transitions. Word has length 21 [2021-07-13 19:50:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:48,659 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 441 transitions. [2021-07-13 19:50:48,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 19:50:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 441 transitions. [2021-07-13 19:50:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:50:48,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:48,661 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] [2021-07-13 19:50:48,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:48,884 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:48,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2037404550, now seen corresponding path program 3 times [2021-07-13 19:50:48,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:48,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033881317] [2021-07-13 19:50:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:49,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:49,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033881317] [2021-07-13 19:50:49,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033881317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:49,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313865747] [2021-07-13 19:50:49,047 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 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 19:50:49,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:49,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:49,152 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 15 treesize of output 11 [2021-07-13 19:50:49,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:49,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:49,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:49,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-07-13 19:50:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:49,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313865747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:49,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:49,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-07-13 19:50:49,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035343443] [2021-07-13 19:50:49,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:49,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:49,217 INFO L87 Difference]: Start difference. First operand 202 states and 441 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 19:50:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:49,414 INFO L93 Difference]: Finished difference Result 440 states and 1008 transitions. [2021-07-13 19:50:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:49,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:50:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:49,417 INFO L225 Difference]: With dead ends: 440 [2021-07-13 19:50:49,417 INFO L226 Difference]: Without dead ends: 429 [2021-07-13 19:50:49,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:50:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-13 19:50:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 199. [2021-07-13 19:50:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.191919191919192) internal successors, (434), 198 states have internal predecessors, (434), 0 states have call successors, (0), 0 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 19:50:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 434 transitions. [2021-07-13 19:50:49,425 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 434 transitions. Word has length 21 [2021-07-13 19:50:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:49,425 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 434 transitions. [2021-07-13 19:50:49,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 19:50:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 434 transitions. [2021-07-13 19:50:49,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:50:49,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:49,426 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] [2021-07-13 19:50:49,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 19:50:49,633 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:49,633 INFO L82 PathProgramCache]: Analyzing trace with hash 107399676, now seen corresponding path program 4 times [2021-07-13 19:50:49,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:49,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627469806] [2021-07-13 19:50:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:49,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:49,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627469806] [2021-07-13 19:50:49,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627469806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:49,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935858351] [2021-07-13 19:50:49,801 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 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 19:50:49,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:49,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:49,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:49,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:49,930 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 19:50:49,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:49,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:49,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:49,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-07-13 19:50:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:49,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935858351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:49,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:49,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-07-13 19:50:49,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661914526] [2021-07-13 19:50:49,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:49,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:49,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:49,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:49,998 INFO L87 Difference]: Start difference. First operand 199 states and 434 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 19:50:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:50,283 INFO L93 Difference]: Finished difference Result 471 states and 1075 transitions. [2021-07-13 19:50:50,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:50,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 21 [2021-07-13 19:50:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:50,292 INFO L225 Difference]: With dead ends: 471 [2021-07-13 19:50:50,292 INFO L226 Difference]: Without dead ends: 462 [2021-07-13 19:50:50,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-13 19:50:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 224. [2021-07-13 19:50:50,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 19:50:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-07-13 19:50:50,300 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-07-13 19:50:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:50,302 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-07-13 19:50:50,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 19:50:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-07-13 19:50:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:50:50,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:50,303 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] [2021-07-13 19:50:50,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:50,526 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:50,526 INFO L82 PathProgramCache]: Analyzing trace with hash 286917116, now seen corresponding path program 5 times [2021-07-13 19:50:50,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:50,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956029093] [2021-07-13 19:50:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:50,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:50,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956029093] [2021-07-13 19:50:50,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956029093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:50,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118547955] [2021-07-13 19:50:50,693 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 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 19:50:50,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:50:50,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:50,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:50,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:50,799 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 19:50:50,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-07-13 19:50:50,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:50,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:50,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:50,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:10 [2021-07-13 19:50:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:50,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118547955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:50,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:50,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-07-13 19:50:50,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364264140] [2021-07-13 19:50:50,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:50,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:50,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:50,866 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 19:50:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:51,094 INFO L93 Difference]: Finished difference Result 472 states and 1084 transitions. [2021-07-13 19:50:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:51,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 21 [2021-07-13 19:50:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:51,096 INFO L225 Difference]: With dead ends: 472 [2021-07-13 19:50:51,096 INFO L226 Difference]: Without dead ends: 463 [2021-07-13 19:50:51,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-13 19:50:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 233. [2021-07-13 19:50:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.206896551724138) internal successors, (512), 232 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 19:50:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 512 transitions. [2021-07-13 19:50:51,105 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 512 transitions. Word has length 21 [2021-07-13 19:50:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:51,105 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 512 transitions. [2021-07-13 19:50:51,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 19:50:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 512 transitions. [2021-07-13 19:50:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:50:51,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:51,106 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] [2021-07-13 19:50:51,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:51,321 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:51,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:51,321 INFO L82 PathProgramCache]: Analyzing trace with hash 152115708, now seen corresponding path program 6 times [2021-07-13 19:50:51,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:51,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570456016] [2021-07-13 19:50:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:51,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:51,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570456016] [2021-07-13 19:50:51,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570456016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:51,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151597224] [2021-07-13 19:50:51,468 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 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 19:50:51,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:50:51,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:51,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:51,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:51,557 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 15 treesize of output 11 [2021-07-13 19:50:51,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:51,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:51,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:51,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-07-13 19:50:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:51,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151597224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:51,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:51,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-07-13 19:50:51,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353943246] [2021-07-13 19:50:51,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:51,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:51,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:51,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:51,622 INFO L87 Difference]: Start difference. First operand 233 states and 512 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 19:50:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:51,889 INFO L93 Difference]: Finished difference Result 469 states and 1074 transitions. [2021-07-13 19:50:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:51,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:50:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:51,892 INFO L225 Difference]: With dead ends: 469 [2021-07-13 19:50:51,892 INFO L226 Difference]: Without dead ends: 458 [2021-07-13 19:50:51,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:51,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-07-13 19:50:51,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 224. [2021-07-13 19:50:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 19:50:51,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-07-13 19:50:51,899 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-07-13 19:50:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:51,900 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-07-13 19:50:51,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 19:50:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-07-13 19:50:51,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:50:51,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:51,901 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:52,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:50:52,124 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:52,124 INFO L82 PathProgramCache]: Analyzing trace with hash -696020967, now seen corresponding path program 7 times [2021-07-13 19:50:52,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:52,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24308360] [2021-07-13 19:50:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:52,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:52,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24308360] [2021-07-13 19:50:52,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24308360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:52,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245864227] [2021-07-13 19:50:52,173 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 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 19:50:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:52,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:50:52,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:52,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245864227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:52,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:52,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:50:52,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397532359] [2021-07-13 19:50:52,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:50:52,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:52,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:50:52,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:50:52,291 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 19:50:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:52,420 INFO L93 Difference]: Finished difference Result 475 states and 1004 transitions. [2021-07-13 19:50:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:52,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:50:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:52,423 INFO L225 Difference]: With dead ends: 475 [2021-07-13 19:50:52,423 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:50:52,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:50:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:50:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 295. [2021-07-13 19:50:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.302721088435374) internal successors, (677), 294 states have internal predecessors, (677), 0 states have call successors, (0), 0 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 19:50:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 677 transitions. [2021-07-13 19:50:52,432 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 677 transitions. Word has length 25 [2021-07-13 19:50:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:52,433 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 677 transitions. [2021-07-13 19:50:52,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 19:50:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 677 transitions. [2021-07-13 19:50:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:50:52,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:52,435 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:52,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:52,649 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1371569347, now seen corresponding path program 8 times [2021-07-13 19:50:52,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:52,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298045389] [2021-07-13 19:50:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:52,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:52,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298045389] [2021-07-13 19:50:52,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298045389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:52,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16071114] [2021-07-13 19:50:52,677 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 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 19:50:52,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:52,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:50:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:52,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16071114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:52,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:52,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:50:52,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863902570] [2021-07-13 19:50:52,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:50:52,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:52,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:50:52,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:50:52,769 INFO L87 Difference]: Start difference. First operand 295 states and 677 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 19:50:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:52,889 INFO L93 Difference]: Finished difference Result 596 states and 1335 transitions. [2021-07-13 19:50:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:52,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:50:52,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:52,892 INFO L225 Difference]: With dead ends: 596 [2021-07-13 19:50:52,892 INFO L226 Difference]: Without dead ends: 565 [2021-07-13 19:50:52,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:50:52,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-13 19:50:52,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 476. [2021-07-13 19:50:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.351578947368421) internal successors, (1117), 475 states have internal predecessors, (1117), 0 states have call successors, (0), 0 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 19:50:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1117 transitions. [2021-07-13 19:50:52,904 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1117 transitions. Word has length 25 [2021-07-13 19:50:52,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:52,904 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1117 transitions. [2021-07-13 19:50:52,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 19:50:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1117 transitions. [2021-07-13 19:50:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:50:52,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:52,906 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:53,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:53,129 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:53,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:53,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2027124135, now seen corresponding path program 9 times [2021-07-13 19:50:53,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:53,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763838838] [2021-07-13 19:50:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:53,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:53,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763838838] [2021-07-13 19:50:53,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763838838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317432613] [2021-07-13 19:50:53,154 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 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 19:50:53,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:50:53,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:50:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:53,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317432613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:53,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:53,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 19:50:53,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028031681] [2021-07-13 19:50:53,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:50:53,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:53,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:50:53,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:50:53,241 INFO L87 Difference]: Start difference. First operand 476 states and 1117 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 19:50:53,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:53,333 INFO L93 Difference]: Finished difference Result 552 states and 1237 transitions. [2021-07-13 19:50:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:53,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:50:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:53,335 INFO L225 Difference]: With dead ends: 552 [2021-07-13 19:50:53,335 INFO L226 Difference]: Without dead ends: 552 [2021-07-13 19:50:53,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:50:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-07-13 19:50:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 471. [2021-07-13 19:50:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.331914893617021) internal successors, (1096), 470 states have internal predecessors, (1096), 0 states have call successors, (0), 0 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 19:50:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1096 transitions. [2021-07-13 19:50:53,347 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1096 transitions. Word has length 25 [2021-07-13 19:50:53,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:53,347 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1096 transitions. [2021-07-13 19:50:53,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 19:50:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1096 transitions. [2021-07-13 19:50:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:50:53,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:53,348 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:53,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 19:50:53,571 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:53,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:53,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1525256391, now seen corresponding path program 10 times [2021-07-13 19:50:53,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:53,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273769447] [2021-07-13 19:50:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:53,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:53,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273769447] [2021-07-13 19:50:53,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273769447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:53,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258719935] [2021-07-13 19:50:53,616 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 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 19:50:53,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:53,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:53,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:50:53,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:53,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258719935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:53,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:53,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 19:50:53,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998059014] [2021-07-13 19:50:53,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:50:53,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:53,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:50:53,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:50:53,678 INFO L87 Difference]: Start difference. First operand 471 states and 1096 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 19:50:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:53,791 INFO L93 Difference]: Finished difference Result 568 states and 1272 transitions. [2021-07-13 19:50:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:50:53,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:50:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:53,796 INFO L225 Difference]: With dead ends: 568 [2021-07-13 19:50:53,796 INFO L226 Difference]: Without dead ends: 565 [2021-07-13 19:50:53,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:50:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-13 19:50:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 474. [2021-07-13 19:50:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.3255813953488373) internal successors, (1100), 473 states have internal predecessors, (1100), 0 states have call successors, (0), 0 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 19:50:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1100 transitions. [2021-07-13 19:50:53,808 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1100 transitions. Word has length 25 [2021-07-13 19:50:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:53,808 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1100 transitions. [2021-07-13 19:50:53,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 19:50:53,808 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1100 transitions. [2021-07-13 19:50:53,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:50:53,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:53,809 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:54,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 19:50:54,025 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:54,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1162212465, now seen corresponding path program 11 times [2021-07-13 19:50:54,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:54,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705120776] [2021-07-13 19:50:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:54,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:54,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705120776] [2021-07-13 19:50:54,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705120776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:54,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970849990] [2021-07-13 19:50:54,050 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 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 19:50:54,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:50:54,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:54,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:50:54,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:50:54,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970849990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:54,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:54,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 19:50:54,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507578517] [2021-07-13 19:50:54,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:50:54,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:54,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:50:54,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:50:54,135 INFO L87 Difference]: Start difference. First operand 474 states and 1100 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:54,237 INFO L93 Difference]: Finished difference Result 699 states and 1561 transitions. [2021-07-13 19:50:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:54,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:50:54,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:54,241 INFO L225 Difference]: With dead ends: 699 [2021-07-13 19:50:54,241 INFO L226 Difference]: Without dead ends: 699 [2021-07-13 19:50:54,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:50:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-07-13 19:50:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 552. [2021-07-13 19:50:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.3611615245009077) internal successors, (1301), 551 states have internal predecessors, (1301), 0 states have call successors, (0), 0 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 19:50:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1301 transitions. [2021-07-13 19:50:54,254 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1301 transitions. Word has length 25 [2021-07-13 19:50:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:54,254 INFO L482 AbstractCegarLoop]: Abstraction has 552 states and 1301 transitions. [2021-07-13 19:50:54,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1301 transitions. [2021-07-13 19:50:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:50:54,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:54,256 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:54,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:50:54,469 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:54,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:54,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1664080209, now seen corresponding path program 12 times [2021-07-13 19:50:54,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:54,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648679650] [2021-07-13 19:50:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:54,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:54,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648679650] [2021-07-13 19:50:54,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648679650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:54,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799779399] [2021-07-13 19:50:54,492 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 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 19:50:54,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:50:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:50:54,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:50:54,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799779399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:54,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:54,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 19:50:54,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389032388] [2021-07-13 19:50:54,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:50:54,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:54,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:50:54,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:50:54,552 INFO L87 Difference]: Start difference. First operand 552 states and 1301 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:54,651 INFO L93 Difference]: Finished difference Result 875 states and 2015 transitions. [2021-07-13 19:50:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:50:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:50:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:54,655 INFO L225 Difference]: With dead ends: 875 [2021-07-13 19:50:54,655 INFO L226 Difference]: Without dead ends: 872 [2021-07-13 19:50:54,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:50:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-07-13 19:50:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 717. [2021-07-13 19:50:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.403631284916201) internal successors, (1721), 716 states have internal predecessors, (1721), 0 states have call successors, (0), 0 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 19:50:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1721 transitions. [2021-07-13 19:50:54,670 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1721 transitions. Word has length 25 [2021-07-13 19:50:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:54,671 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1721 transitions. [2021-07-13 19:50:54,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1721 transitions. [2021-07-13 19:50:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:50:54,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:54,683 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:54,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:54,884 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1322657579, now seen corresponding path program 13 times [2021-07-13 19:50:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:54,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541907341] [2021-07-13 19:50:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:54,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:54,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541907341] [2021-07-13 19:50:54,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541907341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:54,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201558841] [2021-07-13 19:50:54,921 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 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 19:50:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:54,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:50:54,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:50:55,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201558841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:55,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:55,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 19:50:55,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716710694] [2021-07-13 19:50:55,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:50:55,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:55,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:50:55,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:50:55,005 INFO L87 Difference]: Start difference. First operand 717 states and 1721 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:55,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:55,095 INFO L93 Difference]: Finished difference Result 880 states and 2012 transitions. [2021-07-13 19:50:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:55,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:50:55,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:55,099 INFO L225 Difference]: With dead ends: 880 [2021-07-13 19:50:55,099 INFO L226 Difference]: Without dead ends: 880 [2021-07-13 19:50:55,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:50:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-07-13 19:50:55,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 703. [2021-07-13 19:50:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4017094017094016) internal successors, (1686), 702 states have internal predecessors, (1686), 0 states have call successors, (0), 0 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 19:50:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1686 transitions. [2021-07-13 19:50:55,116 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1686 transitions. Word has length 25 [2021-07-13 19:50:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:55,116 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 1686 transitions. [2021-07-13 19:50:55,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:55,116 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1686 transitions. [2021-07-13 19:50:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:50:55,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:55,118 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:55,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:50:55,333 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2065651895, now seen corresponding path program 14 times [2021-07-13 19:50:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:55,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603447438] [2021-07-13 19:50:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:55,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:55,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603447438] [2021-07-13 19:50:55,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603447438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:55,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687475221] [2021-07-13 19:50:55,362 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 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 19:50:55,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:55,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:55,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:50:55,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:50:55,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687475221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:55,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:55,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 19:50:55,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983637680] [2021-07-13 19:50:55,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:50:55,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:55,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:50:55,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:50:55,424 INFO L87 Difference]: Start difference. First operand 703 states and 1686 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:55,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:55,531 INFO L93 Difference]: Finished difference Result 810 states and 1869 transitions. [2021-07-13 19:50:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:50:55,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:50:55,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:55,534 INFO L225 Difference]: With dead ends: 810 [2021-07-13 19:50:55,534 INFO L226 Difference]: Without dead ends: 806 [2021-07-13 19:50:55,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:50:55,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-07-13 19:50:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 703. [2021-07-13 19:50:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4002849002849005) internal successors, (1685), 702 states have internal predecessors, (1685), 0 states have call successors, (0), 0 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 19:50:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1685 transitions. [2021-07-13 19:50:55,548 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1685 transitions. Word has length 25 [2021-07-13 19:50:55,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:55,548 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 1685 transitions. [2021-07-13 19:50:55,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1685 transitions. [2021-07-13 19:50:55,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:50:55,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:55,550 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:55,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:50:55,773 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:55,773 INFO L82 PathProgramCache]: Analyzing trace with hash 893466037, now seen corresponding path program 15 times [2021-07-13 19:50:55,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:55,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154887189] [2021-07-13 19:50:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:55,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:55,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154887189] [2021-07-13 19:50:55,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154887189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:55,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900782737] [2021-07-13 19:50:55,798 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:55,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:50:55,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:55,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:50:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:55,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900782737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:55,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:55,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:50:55,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954145838] [2021-07-13 19:50:55,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:50:55,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:55,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:50:55,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:50:55,888 INFO L87 Difference]: Start difference. First operand 703 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:56,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:56,007 INFO L93 Difference]: Finished difference Result 795 states and 1844 transitions. [2021-07-13 19:50:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:56,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:50:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:56,011 INFO L225 Difference]: With dead ends: 795 [2021-07-13 19:50:56,011 INFO L226 Difference]: Without dead ends: 795 [2021-07-13 19:50:56,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:50:56,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-07-13 19:50:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 698. [2021-07-13 19:50:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.3916786226685796) internal successors, (1667), 697 states have internal predecessors, (1667), 0 states have call successors, (0), 0 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 19:50:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1667 transitions. [2021-07-13 19:50:56,024 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1667 transitions. Word has length 25 [2021-07-13 19:50:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:56,024 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 1667 transitions. [2021-07-13 19:50:56,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1667 transitions. [2021-07-13 19:50:56,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:50:56,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:56,026 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:56,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:56,233 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:56,233 INFO L82 PathProgramCache]: Analyzing trace with hash -886523081, now seen corresponding path program 16 times [2021-07-13 19:50:56,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:56,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465799582] [2021-07-13 19:50:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:56,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:56,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465799582] [2021-07-13 19:50:56,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465799582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:56,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982690410] [2021-07-13 19:50:56,260 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:56,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:56,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:56,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:50:56,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:56,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982690410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:56,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:56,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:50:56,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892709302] [2021-07-13 19:50:56,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:50:56,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:56,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:50:56,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:50:56,351 INFO L87 Difference]: Start difference. First operand 698 states and 1667 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:56,478 INFO L93 Difference]: Finished difference Result 856 states and 1953 transitions. [2021-07-13 19:50:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:56,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:50:56,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:56,481 INFO L225 Difference]: With dead ends: 856 [2021-07-13 19:50:56,481 INFO L226 Difference]: Without dead ends: 835 [2021-07-13 19:50:56,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:50:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-07-13 19:50:56,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 719. [2021-07-13 19:50:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.370473537604457) internal successors, (1702), 718 states have internal predecessors, (1702), 0 states have call successors, (0), 0 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 19:50:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1702 transitions. [2021-07-13 19:50:56,495 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1702 transitions. Word has length 25 [2021-07-13 19:50:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:56,495 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 1702 transitions. [2021-07-13 19:50:56,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1702 transitions. [2021-07-13 19:50:56,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:50:56,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:56,499 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:56,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:56,721 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1579561346, now seen corresponding path program 17 times [2021-07-13 19:50:56,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:56,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688736588] [2021-07-13 19:50:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:57,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:57,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688736588] [2021-07-13 19:50:57,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688736588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:57,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205850412] [2021-07-13 19:50:57,048 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:57,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:50:57,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:57,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:50:57,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:57,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:50:57,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:57,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:57,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:57,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:50:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:57,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205850412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:57,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:57,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-07-13 19:50:57,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400069698] [2021-07-13 19:50:57,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:50:57,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:57,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:50:57,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:57,313 INFO L87 Difference]: Start difference. First operand 719 states and 1702 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:50:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:58,261 INFO L93 Difference]: Finished difference Result 1938 states and 4685 transitions. [2021-07-13 19:50:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:50:58,261 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:50:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:58,270 INFO L225 Difference]: With dead ends: 1938 [2021-07-13 19:50:58,270 INFO L226 Difference]: Without dead ends: 1928 [2021-07-13 19:50:58,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 745.3ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:50:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-07-13 19:50:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 773. [2021-07-13 19:50:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.36139896373057) internal successors, (1823), 772 states have internal predecessors, (1823), 0 states have call successors, (0), 0 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 19:50:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1823 transitions. [2021-07-13 19:50:58,304 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1823 transitions. Word has length 29 [2021-07-13 19:50:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:58,305 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 1823 transitions. [2021-07-13 19:50:58,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:50:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1823 transitions. [2021-07-13 19:50:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:50:58,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:58,308 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:58,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:58,529 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:58,529 INFO L82 PathProgramCache]: Analyzing trace with hash 298021654, now seen corresponding path program 18 times [2021-07-13 19:50:58,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:58,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613227552] [2021-07-13 19:50:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:58,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613227552] [2021-07-13 19:50:58,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613227552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279332932] [2021-07-13 19:50:58,831 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:58,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:50:58,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:58,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:50:58,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:59,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:50:59,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:59,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:59,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:59,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-07-13 19:50:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:59,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279332932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:59,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:59,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-07-13 19:50:59,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237068911] [2021-07-13 19:50:59,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:50:59,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:59,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:50:59,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:59,057 INFO L87 Difference]: Start difference. First operand 773 states and 1823 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:00,253 INFO L93 Difference]: Finished difference Result 2173 states and 5321 transitions. [2021-07-13 19:51:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:51:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:00,262 INFO L225 Difference]: With dead ends: 2173 [2021-07-13 19:51:00,262 INFO L226 Difference]: Without dead ends: 2162 [2021-07-13 19:51:00,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 856.4ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:51:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-07-13 19:51:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 807. [2021-07-13 19:51:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3734491315136474) internal successors, (1913), 806 states have internal predecessors, (1913), 0 states have call successors, (0), 0 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 19:51:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1913 transitions. [2021-07-13 19:51:00,297 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1913 transitions. Word has length 29 [2021-07-13 19:51:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:00,298 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 1913 transitions. [2021-07-13 19:51:00,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1913 transitions. [2021-07-13 19:51:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:00,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:00,300 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:00,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:51:00,506 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:00,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:00,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2054422704, now seen corresponding path program 19 times [2021-07-13 19:51:00,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:00,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743780041] [2021-07-13 19:51:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:00,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:00,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743780041] [2021-07-13 19:51:00,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743780041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:00,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540780223] [2021-07-13 19:51:00,787 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:00,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:00,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:00,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:51:00,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:00,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:00,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:00,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-07-13 19:51:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:00,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540780223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:00,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:00,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-07-13 19:51:00,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004086065] [2021-07-13 19:51:00,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:00,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:00,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:00,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:00,969 INFO L87 Difference]: Start difference. First operand 807 states and 1913 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:02,004 INFO L93 Difference]: Finished difference Result 2310 states and 5631 transitions. [2021-07-13 19:51:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:51:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:02,012 INFO L225 Difference]: With dead ends: 2310 [2021-07-13 19:51:02,012 INFO L226 Difference]: Without dead ends: 2290 [2021-07-13 19:51:02,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 813.0ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:51:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-07-13 19:51:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 796. [2021-07-13 19:51:02,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.372327044025157) internal successors, (1886), 795 states have internal predecessors, (1886), 0 states have call successors, (0), 0 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 19:51:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1886 transitions. [2021-07-13 19:51:02,051 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1886 transitions. Word has length 29 [2021-07-13 19:51:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:02,051 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 1886 transitions. [2021-07-13 19:51:02,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1886 transitions. [2021-07-13 19:51:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:02,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:02,053 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:02,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:51:02,276 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash 483082792, now seen corresponding path program 20 times [2021-07-13 19:51:02,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:02,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655308703] [2021-07-13 19:51:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:02,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:02,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655308703] [2021-07-13 19:51:02,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655308703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:02,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153723922] [2021-07-13 19:51:02,548 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:02,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:02,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:02,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:02,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:02,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:51:02,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:02,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:02,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:02,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:51:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:02,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153723922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:02,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:02,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-07-13 19:51:02,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78484418] [2021-07-13 19:51:02,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:51:02,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:02,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:51:02,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:51:02,764 INFO L87 Difference]: Start difference. First operand 796 states and 1886 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:51:03,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:03,941 INFO L93 Difference]: Finished difference Result 2101 states and 5071 transitions. [2021-07-13 19:51:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:51:03,941 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:03,949 INFO L225 Difference]: With dead ends: 2101 [2021-07-13 19:51:03,949 INFO L226 Difference]: Without dead ends: 2078 [2021-07-13 19:51:03,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 806.8ms TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:51:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-07-13 19:51:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 800. [2021-07-13 19:51:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 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 19:51:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-07-13 19:51:03,975 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-07-13 19:51:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:03,975 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-07-13 19:51:03,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:51:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-07-13 19:51:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:03,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:03,977 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:04,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:04,193 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:04,193 INFO L82 PathProgramCache]: Analyzing trace with hash -830162232, now seen corresponding path program 21 times [2021-07-13 19:51:04,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:04,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302997440] [2021-07-13 19:51:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:04,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:04,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302997440] [2021-07-13 19:51:04,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302997440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:04,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374780247] [2021-07-13 19:51:04,459 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:04,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:04,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:04,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:51:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:04,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:51:04,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:04,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:51:04,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:04,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:04,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:04,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:10 [2021-07-13 19:51:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:04,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374780247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:04,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:04,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 19:51:04,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416510791] [2021-07-13 19:51:04,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:51:04,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:04,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:51:04,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:51:04,855 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:51:06,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:06,212 INFO L93 Difference]: Finished difference Result 1859 states and 4469 transitions. [2021-07-13 19:51:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:51:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:06,218 INFO L225 Difference]: With dead ends: 1859 [2021-07-13 19:51:06,218 INFO L226 Difference]: Without dead ends: 1849 [2021-07-13 19:51:06,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1013.4ms TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:51:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-07-13 19:51:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 800. [2021-07-13 19:51:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 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 19:51:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-07-13 19:51:06,237 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-07-13 19:51:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:06,238 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-07-13 19:51:06,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:51:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-07-13 19:51:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:06,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:06,240 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:06,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:51:06,453 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:06,453 INFO L82 PathProgramCache]: Analyzing trace with hash 813575516, now seen corresponding path program 22 times [2021-07-13 19:51:06,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:06,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742661397] [2021-07-13 19:51:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:06,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:06,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742661397] [2021-07-13 19:51:06,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742661397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:06,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682616166] [2021-07-13 19:51:06,728 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:06,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:06,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:06,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:06,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:06,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:51:06,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:06,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:06,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:06,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:51:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:06,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682616166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:06,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:06,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-07-13 19:51:06,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121114699] [2021-07-13 19:51:06,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:06,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:06,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:06,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:06,991 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:08,383 INFO L93 Difference]: Finished difference Result 2092 states and 5123 transitions. [2021-07-13 19:51:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:51:08,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:08,387 INFO L225 Difference]: With dead ends: 2092 [2021-07-13 19:51:08,387 INFO L226 Difference]: Without dead ends: 2083 [2021-07-13 19:51:08,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 961.4ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:51:08,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-07-13 19:51:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 825. [2021-07-13 19:51:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.371359223300971) internal successors, (1954), 824 states have internal predecessors, (1954), 0 states have call successors, (0), 0 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 19:51:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1954 transitions. [2021-07-13 19:51:08,405 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1954 transitions. Word has length 29 [2021-07-13 19:51:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:08,406 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 1954 transitions. [2021-07-13 19:51:08,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1954 transitions. [2021-07-13 19:51:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:08,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:08,408 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:08,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:08,621 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash 993092956, now seen corresponding path program 23 times [2021-07-13 19:51:08,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:08,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102502075] [2021-07-13 19:51:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:08,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:08,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102502075] [2021-07-13 19:51:08,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102502075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:08,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690830503] [2021-07-13 19:51:08,896 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:08,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:51:08,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:08,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:08,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:09,070 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:51:09,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 51 [2021-07-13 19:51:09,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:09,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:09,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:09,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:13 [2021-07-13 19:51:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:09,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690830503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:09,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:09,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-07-13 19:51:09,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695415211] [2021-07-13 19:51:09,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:09,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:09,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:09,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:09,120 INFO L87 Difference]: Start difference. First operand 825 states and 1954 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 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 19:51:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:10,201 INFO L93 Difference]: Finished difference Result 2113 states and 5192 transitions. [2021-07-13 19:51:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:51:10,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 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 29 [2021-07-13 19:51:10,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:10,210 INFO L225 Difference]: With dead ends: 2113 [2021-07-13 19:51:10,210 INFO L226 Difference]: Without dead ends: 2102 [2021-07-13 19:51:10,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 852.0ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:51:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-07-13 19:51:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 837. [2021-07-13 19:51:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.373205741626794) internal successors, (1984), 836 states have internal predecessors, (1984), 0 states have call successors, (0), 0 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 19:51:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1984 transitions. [2021-07-13 19:51:10,229 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1984 transitions. Word has length 29 [2021-07-13 19:51:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:10,229 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 1984 transitions. [2021-07-13 19:51:10,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 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 19:51:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1984 transitions. [2021-07-13 19:51:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:10,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:10,232 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:10,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:51:10,445 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash 858291548, now seen corresponding path program 24 times [2021-07-13 19:51:10,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:10,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474973079] [2021-07-13 19:51:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:10,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:10,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474973079] [2021-07-13 19:51:10,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474973079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:10,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394554702] [2021-07-13 19:51:10,759 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:10,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:51:10,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:10,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:51:10,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:10,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:10,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 19:51:11,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:51:11,057 INFO L628 ElimStorePlain]: treesize reduction 24, result has 65.2 percent of original size [2021-07-13 19:51:11,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:11,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:45 [2021-07-13 19:51:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:11,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394554702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:11,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:11,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 19:51:11,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313863566] [2021-07-13 19:51:11,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:51:11,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:11,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:51:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:51:11,203 INFO L87 Difference]: Start difference. First operand 837 states and 1984 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 19:51:13,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:13,527 INFO L93 Difference]: Finished difference Result 2331 states and 5739 transitions. [2021-07-13 19:51:13,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:51:13,528 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:13,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:13,532 INFO L225 Difference]: With dead ends: 2331 [2021-07-13 19:51:13,532 INFO L226 Difference]: Without dead ends: 2310 [2021-07-13 19:51:13,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1818.3ms TimeCoverageRelationStatistics Valid=355, Invalid=2095, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:51:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-07-13 19:51:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 824. [2021-07-13 19:51:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 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 19:51:13,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-07-13 19:51:13,547 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-07-13 19:51:13,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:13,548 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-07-13 19:51:13,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 19:51:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-07-13 19:51:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:13,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:13,549 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:13,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:51:13,772 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:13,772 INFO L82 PathProgramCache]: Analyzing trace with hash -949069254, now seen corresponding path program 25 times [2021-07-13 19:51:13,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:13,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584293007] [2021-07-13 19:51:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:14,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:14,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584293007] [2021-07-13 19:51:14,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584293007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:14,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365078073] [2021-07-13 19:51:14,113 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:14,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:14,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:14,325 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:51:14,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 51 [2021-07-13 19:51:14,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:14,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:14,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:14,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:13 [2021-07-13 19:51:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:14,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365078073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:14,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:14,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-07-13 19:51:14,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072796911] [2021-07-13 19:51:14,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:14,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:14,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:14,361 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:15,532 INFO L93 Difference]: Finished difference Result 2128 states and 5217 transitions. [2021-07-13 19:51:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:51:15,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:15,536 INFO L225 Difference]: With dead ends: 2128 [2021-07-13 19:51:15,536 INFO L226 Difference]: Without dead ends: 2117 [2021-07-13 19:51:15,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 944.4ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:51:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-07-13 19:51:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 845. [2021-07-13 19:51:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.376777251184834) internal successors, (2006), 844 states have internal predecessors, (2006), 0 states have call successors, (0), 0 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 19:51:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2006 transitions. [2021-07-13 19:51:15,559 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2006 transitions. Word has length 29 [2021-07-13 19:51:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:15,560 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2006 transitions. [2021-07-13 19:51:15,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2006 transitions. [2021-07-13 19:51:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:15,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:15,561 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:15,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 19:51:15,784 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:15,784 INFO L82 PathProgramCache]: Analyzing trace with hash 807331796, now seen corresponding path program 26 times [2021-07-13 19:51:15,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:15,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590714989] [2021-07-13 19:51:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:16,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:16,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590714989] [2021-07-13 19:51:16,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590714989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:16,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921575829] [2021-07-13 19:51:16,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:16,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:16,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:16,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:51:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:16,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:51:16,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:16,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:16,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:16,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-07-13 19:51:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:16,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921575829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:16,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:16,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-07-13 19:51:16,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707389567] [2021-07-13 19:51:16,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:16,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:16,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:16,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:16,272 INFO L87 Difference]: Start difference. First operand 845 states and 2006 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:17,820 INFO L93 Difference]: Finished difference Result 2243 states and 5486 transitions. [2021-07-13 19:51:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:51:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:17,826 INFO L225 Difference]: With dead ends: 2243 [2021-07-13 19:51:17,826 INFO L226 Difference]: Without dead ends: 2223 [2021-07-13 19:51:17,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1215.2ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:51:17,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-07-13 19:51:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 833. [2021-07-13 19:51:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.373798076923077) internal successors, (1975), 832 states have internal predecessors, (1975), 0 states have call successors, (0), 0 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 19:51:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1975 transitions. [2021-07-13 19:51:17,848 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1975 transitions. Word has length 29 [2021-07-13 19:51:17,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:17,848 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 1975 transitions. [2021-07-13 19:51:17,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1975 transitions. [2021-07-13 19:51:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:17,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:17,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:18,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:18,063 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:18,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1958681432, now seen corresponding path program 27 times [2021-07-13 19:51:18,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:18,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743265073] [2021-07-13 19:51:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:18,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:18,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743265073] [2021-07-13 19:51:18,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743265073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:18,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669766601] [2021-07-13 19:51:18,370 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:18,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:18,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:18,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:51:18,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:18,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:18,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-07-13 19:51:18,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:51:18,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:18,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:18,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:109 [2021-07-13 19:51:19,087 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-13 19:51:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:19,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669766601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:19,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:19,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:51:19,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989003402] [2021-07-13 19:51:19,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:51:19,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:51:19,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:51:19,147 INFO L87 Difference]: Start difference. First operand 833 states and 1975 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:51:19,788 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 19:51:20,735 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-07-13 19:51:22,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:22,530 INFO L93 Difference]: Finished difference Result 2108 states and 5089 transitions. [2021-07-13 19:51:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:51:22,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 29 [2021-07-13 19:51:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:22,535 INFO L225 Difference]: With dead ends: 2108 [2021-07-13 19:51:22,536 INFO L226 Difference]: Without dead ends: 2088 [2021-07-13 19:51:22,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 3228.3ms TimeCoverageRelationStatistics Valid=649, Invalid=2891, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:51:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-07-13 19:51:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 841. [2021-07-13 19:51:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.3773809523809524) internal successors, (1997), 840 states have internal predecessors, (1997), 0 states have call successors, (0), 0 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 19:51:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1997 transitions. [2021-07-13 19:51:22,556 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1997 transitions. Word has length 29 [2021-07-13 19:51:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:22,556 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 1997 transitions. [2021-07-13 19:51:22,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:51:22,557 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1997 transitions. [2021-07-13 19:51:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:22,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:22,558 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:22,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 19:51:22,777 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:22,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:22,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1911744554, now seen corresponding path program 28 times [2021-07-13 19:51:22,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:22,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794947776] [2021-07-13 19:51:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:23,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:23,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794947776] [2021-07-13 19:51:23,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794947776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:23,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557702069] [2021-07-13 19:51:23,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:23,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:23,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:23,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:23,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:23,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:51:23,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:23,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:23,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:23,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-07-13 19:51:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:23,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557702069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:23,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:23,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-07-13 19:51:23,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411982058] [2021-07-13 19:51:23,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:23,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:23,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:23,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:23,256 INFO L87 Difference]: Start difference. First operand 841 states and 1997 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:24,141 INFO L93 Difference]: Finished difference Result 2251 states and 5527 transitions. [2021-07-13 19:51:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:51:24,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:24,145 INFO L225 Difference]: With dead ends: 2251 [2021-07-13 19:51:24,145 INFO L226 Difference]: Without dead ends: 2240 [2021-07-13 19:51:24,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 737.5ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:51:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-07-13 19:51:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 875. [2021-07-13 19:51:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.3878718535469106) internal successors, (2087), 874 states have internal predecessors, (2087), 0 states have call successors, (0), 0 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 19:51:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2087 transitions. [2021-07-13 19:51:24,168 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2087 transitions. Word has length 29 [2021-07-13 19:51:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:24,168 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2087 transitions. [2021-07-13 19:51:24,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2087 transitions. [2021-07-13 19:51:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:24,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:24,170 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:24,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:24,385 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:24,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:24,385 INFO L82 PathProgramCache]: Analyzing trace with hash -626821692, now seen corresponding path program 29 times [2021-07-13 19:51:24,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:24,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130016936] [2021-07-13 19:51:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:24,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:24,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130016936] [2021-07-13 19:51:24,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130016936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:24,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491033214] [2021-07-13 19:51:24,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:24,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:24,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:24,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:24,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:24,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:51:24,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:24,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:24,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:24,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-07-13 19:51:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:24,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491033214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:24,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:24,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-07-13 19:51:24,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909269023] [2021-07-13 19:51:24,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:24,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:24,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:24,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:24,879 INFO L87 Difference]: Start difference. First operand 875 states and 2087 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:25,875 INFO L93 Difference]: Finished difference Result 2348 states and 5739 transitions. [2021-07-13 19:51:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:51:25,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:25,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:25,878 INFO L225 Difference]: With dead ends: 2348 [2021-07-13 19:51:25,878 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 19:51:25,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 860.1ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:51:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 19:51:25,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 850. [2021-07-13 19:51:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.380447585394582) internal successors, (2021), 849 states have internal predecessors, (2021), 0 states have call successors, (0), 0 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 19:51:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2021 transitions. [2021-07-13 19:51:25,898 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2021 transitions. Word has length 29 [2021-07-13 19:51:25,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:25,899 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2021 transitions. [2021-07-13 19:51:25,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 19:51:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2021 transitions. [2021-07-13 19:51:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:25,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:25,900 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:26,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:51:26,117 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:26,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2096805692, now seen corresponding path program 30 times [2021-07-13 19:51:26,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:26,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263991451] [2021-07-13 19:51:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:26,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:26,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263991451] [2021-07-13 19:51:26,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263991451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:26,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992240745] [2021-07-13 19:51:26,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:26,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:51:26,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:26,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:51:26,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:26,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:51:26,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:26,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 19:51:26,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:26,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:26,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:26,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:44 [2021-07-13 19:51:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:26,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992240745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:26,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:26,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-07-13 19:51:26,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615828939] [2021-07-13 19:51:26,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:51:26,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:26,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:51:26,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:51:26,861 INFO L87 Difference]: Start difference. First operand 850 states and 2021 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:28,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:28,650 INFO L93 Difference]: Finished difference Result 2256 states and 5439 transitions. [2021-07-13 19:51:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:51:28,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:28,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:28,654 INFO L225 Difference]: With dead ends: 2256 [2021-07-13 19:51:28,655 INFO L226 Difference]: Without dead ends: 2236 [2021-07-13 19:51:28,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1407.6ms TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:51:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-07-13 19:51:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 853. [2021-07-13 19:51:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 2.380281690140845) internal successors, (2028), 852 states have internal predecessors, (2028), 0 states have call successors, (0), 0 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 19:51:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2028 transitions. [2021-07-13 19:51:28,680 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2028 transitions. Word has length 29 [2021-07-13 19:51:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:28,681 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2028 transitions. [2021-07-13 19:51:28,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2028 transitions. [2021-07-13 19:51:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:28,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:28,682 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:28,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-13 19:51:28,906 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:28,906 INFO L82 PathProgramCache]: Analyzing trace with hash 783560668, now seen corresponding path program 31 times [2021-07-13 19:51:28,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:28,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749587760] [2021-07-13 19:51:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:29,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:29,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749587760] [2021-07-13 19:51:29,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749587760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:29,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585692833] [2021-07-13 19:51:29,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:29,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:29,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:29,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:51:29,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:29,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:29,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:29,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:51:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:29,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585692833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:29,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:29,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-07-13 19:51:29,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36950654] [2021-07-13 19:51:29,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:51:29,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:29,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:51:29,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:51:29,369 INFO L87 Difference]: Start difference. First operand 853 states and 2028 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:51:30,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:30,190 INFO L93 Difference]: Finished difference Result 2014 states and 4879 transitions. [2021-07-13 19:51:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:51:30,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:30,193 INFO L225 Difference]: With dead ends: 2014 [2021-07-13 19:51:30,193 INFO L226 Difference]: Without dead ends: 2004 [2021-07-13 19:51:30,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 671.8ms TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:51:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2021-07-13 19:51:30,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 850. [2021-07-13 19:51:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.380447585394582) internal successors, (2021), 849 states have internal predecessors, (2021), 0 states have call successors, (0), 0 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 19:51:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2021 transitions. [2021-07-13 19:51:30,207 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2021 transitions. Word has length 29 [2021-07-13 19:51:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:30,207 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2021 transitions. [2021-07-13 19:51:30,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:51:30,207 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2021 transitions. [2021-07-13 19:51:30,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:30,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:30,209 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:30,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:51:30,412 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:30,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:30,412 INFO L82 PathProgramCache]: Analyzing trace with hash -971697880, now seen corresponding path program 32 times [2021-07-13 19:51:30,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:30,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144832103] [2021-07-13 19:51:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:30,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:30,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144832103] [2021-07-13 19:51:30,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144832103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:30,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090283471] [2021-07-13 19:51:30,686 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:30,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:30,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:30,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:51:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:30,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:30,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 19:51:30,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:30,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:30,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:30,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-07-13 19:51:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:31,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090283471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:31,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:31,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 19:51:31,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478869082] [2021-07-13 19:51:31,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:51:31,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:31,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:51:31,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:51:31,057 INFO L87 Difference]: Start difference. First operand 850 states and 2021 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:51:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:33,527 INFO L93 Difference]: Finished difference Result 2408 states and 5830 transitions. [2021-07-13 19:51:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:51:33,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:33,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:33,531 INFO L225 Difference]: With dead ends: 2408 [2021-07-13 19:51:33,531 INFO L226 Difference]: Without dead ends: 2372 [2021-07-13 19:51:33,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1940.4ms TimeCoverageRelationStatistics Valid=474, Invalid=2076, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:51:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2021-07-13 19:51:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 844. [2021-07-13 19:51:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.377224199288256) internal successors, (2004), 843 states have internal predecessors, (2004), 0 states have call successors, (0), 0 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 19:51:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2004 transitions. [2021-07-13 19:51:33,546 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2004 transitions. Word has length 29 [2021-07-13 19:51:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:33,546 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2004 transitions. [2021-07-13 19:51:33,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:51:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2004 transitions. [2021-07-13 19:51:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:33,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:33,548 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:33,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 19:51:33,761 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:33,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1211178052, now seen corresponding path program 33 times [2021-07-13 19:51:33,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:33,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774921535] [2021-07-13 19:51:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:33,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774921535] [2021-07-13 19:51:33,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774921535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248350705] [2021-07-13 19:51:33,994 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:34,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:34,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:34,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:34,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:34,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:51:34,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:34,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:34,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:34,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:51:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:34,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248350705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:34,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:34,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-07-13 19:51:34,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730794102] [2021-07-13 19:51:34,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:51:34,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:34,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:51:34,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:51:34,230 INFO L87 Difference]: Start difference. First operand 844 states and 2004 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:51:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:35,518 INFO L93 Difference]: Finished difference Result 2149 states and 5171 transitions. [2021-07-13 19:51:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:51:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:35,522 INFO L225 Difference]: With dead ends: 2149 [2021-07-13 19:51:35,522 INFO L226 Difference]: Without dead ends: 2126 [2021-07-13 19:51:35,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 891.7ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:51:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-07-13 19:51:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 824. [2021-07-13 19:51:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 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 19:51:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-07-13 19:51:35,535 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-07-13 19:51:35,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:35,535 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-07-13 19:51:35,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:51:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-07-13 19:51:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:35,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:35,536 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:35,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:35,737 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:35,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1213098440, now seen corresponding path program 34 times [2021-07-13 19:51:35,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:35,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594889125] [2021-07-13 19:51:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:36,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:36,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594889125] [2021-07-13 19:51:36,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594889125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:36,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452002200] [2021-07-13 19:51:36,028 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:36,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:36,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:36,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:36,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:51:36,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:36,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:36,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:36,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:51:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:36,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452002200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:36,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:36,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-13 19:51:36,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016678426] [2021-07-13 19:51:36,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:51:36,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:36,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:51:36,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:51:36,286 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:51:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:37,534 INFO L93 Difference]: Finished difference Result 2144 states and 5261 transitions. [2021-07-13 19:51:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:51:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:37,538 INFO L225 Difference]: With dead ends: 2144 [2021-07-13 19:51:37,538 INFO L226 Difference]: Without dead ends: 2135 [2021-07-13 19:51:37,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 870.2ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:51:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-07-13 19:51:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 846. [2021-07-13 19:51:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.3775147928994085) internal successors, (2009), 845 states have internal predecessors, (2009), 0 states have call successors, (0), 0 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 19:51:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2009 transitions. [2021-07-13 19:51:37,554 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2009 transitions. Word has length 29 [2021-07-13 19:51:37,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:37,554 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 2009 transitions. [2021-07-13 19:51:37,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:51:37,554 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2009 transitions. [2021-07-13 19:51:37,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:37,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:37,555 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:37,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 19:51:37,760 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1392615880, now seen corresponding path program 35 times [2021-07-13 19:51:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:37,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156465806] [2021-07-13 19:51:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:38,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:38,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156465806] [2021-07-13 19:51:38,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156465806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:38,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083014496] [2021-07-13 19:51:38,028 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:38,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:38,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:38,052 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:51:38,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:38,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:51:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:51:38,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:38,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:38,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 19:51:38,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:38,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:38,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:38,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:10 [2021-07-13 19:51:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:38,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083014496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:38,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:38,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:51:38,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5971035] [2021-07-13 19:51:38,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:51:38,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:38,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:51:38,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:51:38,408 INFO L87 Difference]: Start difference. First operand 846 states and 2009 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:51:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:39,727 INFO L93 Difference]: Finished difference Result 2022 states and 4979 transitions. [2021-07-13 19:51:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:51:39,727 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:39,730 INFO L225 Difference]: With dead ends: 2022 [2021-07-13 19:51:39,730 INFO L226 Difference]: Without dead ends: 2013 [2021-07-13 19:51:39,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1189.6ms TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:51:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2021-07-13 19:51:39,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 861. [2021-07-13 19:51:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.3825581395348836) internal successors, (2049), 860 states have internal predecessors, (2049), 0 states have call successors, (0), 0 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 19:51:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2049 transitions. [2021-07-13 19:51:39,744 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2049 transitions. Word has length 29 [2021-07-13 19:51:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:39,744 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2049 transitions. [2021-07-13 19:51:39,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:51:39,744 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2049 transitions. [2021-07-13 19:51:39,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:39,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:39,746 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:39,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 19:51:39,953 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:39,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1257814472, now seen corresponding path program 36 times [2021-07-13 19:51:39,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:39,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467425839] [2021-07-13 19:51:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:40,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:40,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467425839] [2021-07-13 19:51:40,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467425839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:40,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348873016] [2021-07-13 19:51:40,209 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:40,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:51:40,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:40,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:40,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:40,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:51:40,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:51:40,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:40,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:40,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:40,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:51:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:40,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348873016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:40,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:40,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 19:51:40,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361309115] [2021-07-13 19:51:40,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:51:40,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:40,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:51:40,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:51:40,463 INFO L87 Difference]: Start difference. First operand 861 states and 2049 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:51:41,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:41,358 INFO L93 Difference]: Finished difference Result 2246 states and 5527 transitions. [2021-07-13 19:51:41,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:51:41,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:41,361 INFO L225 Difference]: With dead ends: 2246 [2021-07-13 19:51:41,361 INFO L226 Difference]: Without dead ends: 2229 [2021-07-13 19:51:41,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 800.2ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:51:41,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-07-13 19:51:41,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 868. [2021-07-13 19:51:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.384083044982699) internal successors, (2067), 867 states have internal predecessors, (2067), 0 states have call successors, (0), 0 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 19:51:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2067 transitions. [2021-07-13 19:51:41,376 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2067 transitions. Word has length 29 [2021-07-13 19:51:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:41,376 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2067 transitions. [2021-07-13 19:51:41,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:51:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2067 transitions. [2021-07-13 19:51:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:41,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:41,377 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:41,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 19:51:41,578 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:41,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:41,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1067307730, now seen corresponding path program 37 times [2021-07-13 19:51:41,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:41,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769667865] [2021-07-13 19:51:41,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:41,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:41,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769667865] [2021-07-13 19:51:41,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769667865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:41,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078845856] [2021-07-13 19:51:41,828 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:41,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:41,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:41,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:51:41,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:42,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:42,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:42,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:51:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:42,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078845856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:42,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:42,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 19:51:42,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753530586] [2021-07-13 19:51:42,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:51:42,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:42,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:51:42,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:51:42,036 INFO L87 Difference]: Start difference. First operand 868 states and 2067 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 19:51:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:43,352 INFO L93 Difference]: Finished difference Result 2407 states and 5963 transitions. [2021-07-13 19:51:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:51:43,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:43,356 INFO L225 Difference]: With dead ends: 2407 [2021-07-13 19:51:43,356 INFO L226 Difference]: Without dead ends: 2392 [2021-07-13 19:51:43,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1098.3ms TimeCoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:51:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-07-13 19:51:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 837. [2021-07-13 19:51:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.374401913875598) internal successors, (1985), 836 states have internal predecessors, (1985), 0 states have call successors, (0), 0 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 19:51:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1985 transitions. [2021-07-13 19:51:43,371 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1985 transitions. Word has length 29 [2021-07-13 19:51:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:43,371 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 1985 transitions. [2021-07-13 19:51:43,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 19:51:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1985 transitions. [2021-07-13 19:51:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:43,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:43,373 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:43,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 19:51:43,575 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:43,576 INFO L82 PathProgramCache]: Analyzing trace with hash -549546330, now seen corresponding path program 38 times [2021-07-13 19:51:43,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:43,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107540682] [2021-07-13 19:51:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:43,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:43,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107540682] [2021-07-13 19:51:43,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107540682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:43,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768277946] [2021-07-13 19:51:43,910 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:43,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:43,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:43,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:51:43,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:44,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:51:44,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:44,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:44,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:44,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:51:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:44,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768277946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:44,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:44,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:51:44,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908126712] [2021-07-13 19:51:44,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:51:44,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:51:44,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:51:44,112 INFO L87 Difference]: Start difference. First operand 837 states and 1985 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:51:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:45,225 INFO L93 Difference]: Finished difference Result 2169 states and 5328 transitions. [2021-07-13 19:51:45,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:51:45,225 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:45,228 INFO L225 Difference]: With dead ends: 2169 [2021-07-13 19:51:45,228 INFO L226 Difference]: Without dead ends: 2158 [2021-07-13 19:51:45,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 948.7ms TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:51:45,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-07-13 19:51:45,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 858. [2021-07-13 19:51:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.379229871645274) internal successors, (2039), 857 states have internal predecessors, (2039), 0 states have call successors, (0), 0 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 19:51:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2039 transitions. [2021-07-13 19:51:45,243 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2039 transitions. Word has length 29 [2021-07-13 19:51:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:45,243 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2039 transitions. [2021-07-13 19:51:45,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:51:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2039 transitions. [2021-07-13 19:51:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:45,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:45,244 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:45,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:45,445 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:45,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:45,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1206854720, now seen corresponding path program 39 times [2021-07-13 19:51:45,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:45,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151088497] [2021-07-13 19:51:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:45,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:45,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151088497] [2021-07-13 19:51:45,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151088497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:45,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493093389] [2021-07-13 19:51:45,779 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:45,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:45,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:45,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:45,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:51:45,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:51:45,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:46,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:46,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:46,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:51:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:46,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493093389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:46,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:46,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:51:46,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664101355] [2021-07-13 19:51:46,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:51:46,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:46,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:51:46,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:51:46,047 INFO L87 Difference]: Start difference. First operand 858 states and 2039 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:51:47,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:47,185 INFO L93 Difference]: Finished difference Result 2228 states and 5468 transitions. [2021-07-13 19:51:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:51:47,186 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:47,189 INFO L225 Difference]: With dead ends: 2228 [2021-07-13 19:51:47,189 INFO L226 Difference]: Without dead ends: 2208 [2021-07-13 19:51:47,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1060.8ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:51:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-07-13 19:51:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 846. [2021-07-13 19:51:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.3763313609467454) internal successors, (2008), 845 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 19:51:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2008 transitions. [2021-07-13 19:51:47,203 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2008 transitions. Word has length 29 [2021-07-13 19:51:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:47,203 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 2008 transitions. [2021-07-13 19:51:47,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:51:47,203 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2008 transitions. [2021-07-13 19:51:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:47,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:47,204 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:47,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:47,413 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:47,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1559158508, now seen corresponding path program 40 times [2021-07-13 19:51:47,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:47,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708161984] [2021-07-13 19:51:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:47,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:47,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708161984] [2021-07-13 19:51:47,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708161984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:47,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55816751] [2021-07-13 19:51:47,728 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:47,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:47,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:47,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:47,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:47,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:51:47,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 19:51:47,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:47,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:47,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:47,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-07-13 19:51:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:47,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55816751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:47,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:47,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:51:47,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423936472] [2021-07-13 19:51:47,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:51:47,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:47,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:51:47,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:51:47,990 INFO L87 Difference]: Start difference. First operand 846 states and 2008 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:49,274 INFO L93 Difference]: Finished difference Result 1958 states and 4753 transitions. [2021-07-13 19:51:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:51:49,274 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:49,277 INFO L225 Difference]: With dead ends: 1958 [2021-07-13 19:51:49,277 INFO L226 Difference]: Without dead ends: 1935 [2021-07-13 19:51:49,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1121.9ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:51:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-07-13 19:51:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 828. [2021-07-13 19:51:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.3712212817412333) internal successors, (1961), 827 states have internal predecessors, (1961), 0 states have call successors, (0), 0 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 19:51:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1961 transitions. [2021-07-13 19:51:49,300 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1961 transitions. Word has length 29 [2021-07-13 19:51:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:49,300 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 1961 transitions. [2021-07-13 19:51:49,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1961 transitions. [2021-07-13 19:51:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:49,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:49,301 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:49,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:49,523 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:49,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1983699818, now seen corresponding path program 41 times [2021-07-13 19:51:49,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:49,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315574480] [2021-07-13 19:51:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:49,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:49,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315574480] [2021-07-13 19:51:49,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315574480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:49,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440303998] [2021-07-13 19:51:49,763 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:49,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:49,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:49,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:51:49,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:51:49,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:51:49,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:49,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:49,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:49,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:51:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:49,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440303998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:49,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:49,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:51:49,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134023853] [2021-07-13 19:51:49,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:51:49,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:49,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:51:49,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:51:49,994 INFO L87 Difference]: Start difference. First operand 828 states and 1961 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:51:50,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:50,894 INFO L93 Difference]: Finished difference Result 2320 states and 5704 transitions. [2021-07-13 19:51:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:51:50,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:50,897 INFO L225 Difference]: With dead ends: 2320 [2021-07-13 19:51:50,897 INFO L226 Difference]: Without dead ends: 2309 [2021-07-13 19:51:50,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 771.5ms TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:51:50,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-07-13 19:51:50,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 862. [2021-07-13 19:51:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.3821138211382116) internal successors, (2051), 861 states have internal predecessors, (2051), 0 states have call successors, (0), 0 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 19:51:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2051 transitions. [2021-07-13 19:51:50,912 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2051 transitions. Word has length 29 [2021-07-13 19:51:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:50,912 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2051 transitions. [2021-07-13 19:51:50,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:51:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2051 transitions. [2021-07-13 19:51:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:50,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:50,914 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:51,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:51,115 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:51,115 INFO L82 PathProgramCache]: Analyzing trace with hash -227298768, now seen corresponding path program 42 times [2021-07-13 19:51:51,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:51,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241273841] [2021-07-13 19:51:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:51,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:51,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241273841] [2021-07-13 19:51:51,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241273841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:51,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298058788] [2021-07-13 19:51:51,342 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:51,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:51:51,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:51,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:51:51,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:51,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:51,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:51:51,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:51:51,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:51,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:51,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:221 [2021-07-13 19:51:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:52,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298058788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:52,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:52,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:51:52,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010969931] [2021-07-13 19:51:52,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:51:52,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:52,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:51:52,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:51:52,063 INFO L87 Difference]: Start difference. First operand 862 states and 2051 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:51:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:54,088 INFO L93 Difference]: Finished difference Result 2245 states and 5517 transitions. [2021-07-13 19:51:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:51:54,089 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:54,092 INFO L225 Difference]: With dead ends: 2245 [2021-07-13 19:51:54,092 INFO L226 Difference]: Without dead ends: 2232 [2021-07-13 19:51:54,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1676.0ms TimeCoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:51:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-07-13 19:51:54,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 870. [2021-07-13 19:51:54,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 2.378596087456847) internal successors, (2067), 869 states have internal predecessors, (2067), 0 states have call successors, (0), 0 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 19:51:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2067 transitions. [2021-07-13 19:51:54,106 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2067 transitions. Word has length 29 [2021-07-13 19:51:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:54,106 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2067 transitions. [2021-07-13 19:51:54,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:51:54,106 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2067 transitions. [2021-07-13 19:51:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:54,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:54,107 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:54,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 19:51:54,308 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:54,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1145248958, now seen corresponding path program 43 times [2021-07-13 19:51:54,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:54,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979062061] [2021-07-13 19:51:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:54,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:54,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979062061] [2021-07-13 19:51:54,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979062061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:54,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209073723] [2021-07-13 19:51:54,582 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:54,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:54,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:54,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:51:54,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:54,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:54,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:54,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:51:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:54,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209073723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:54,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:54,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:51:54,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298038174] [2021-07-13 19:51:54,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:51:54,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:54,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:51:54,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:51:54,875 INFO L87 Difference]: Start difference. First operand 870 states and 2067 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:56,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:56,276 INFO L93 Difference]: Finished difference Result 2612 states and 6377 transitions. [2021-07-13 19:51:56,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:51:56,277 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:56,280 INFO L225 Difference]: With dead ends: 2612 [2021-07-13 19:51:56,280 INFO L226 Difference]: Without dead ends: 2594 [2021-07-13 19:51:56,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1339.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1714, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:51:56,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2021-07-13 19:51:56,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 858. [2021-07-13 19:51:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.3745624270711785) internal successors, (2035), 857 states have internal predecessors, (2035), 0 states have call successors, (0), 0 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 19:51:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2035 transitions. [2021-07-13 19:51:56,307 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2035 transitions. Word has length 29 [2021-07-13 19:51:56,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:56,307 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2035 transitions. [2021-07-13 19:51:56,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2035 transitions. [2021-07-13 19:51:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:56,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:56,309 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:56,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:56,523 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1798638680, now seen corresponding path program 44 times [2021-07-13 19:51:56,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:56,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405756355] [2021-07-13 19:51:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:56,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:56,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405756355] [2021-07-13 19:51:56,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405756355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:56,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059036016] [2021-07-13 19:51:56,753 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:56,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:56,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:56,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:51:56,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:57,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:51:57,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:57,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-13 19:51:57,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:51:57,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:57,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:57,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:53 [2021-07-13 19:51:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:57,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059036016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:57,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:57,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:51:57,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876049799] [2021-07-13 19:51:57,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:51:57,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:51:57,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:51:57,237 INFO L87 Difference]: Start difference. First operand 858 states and 2035 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:58,691 INFO L93 Difference]: Finished difference Result 2184 states and 5285 transitions. [2021-07-13 19:51:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:51:58,692 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:51:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:58,694 INFO L225 Difference]: With dead ends: 2184 [2021-07-13 19:51:58,695 INFO L226 Difference]: Without dead ends: 2164 [2021-07-13 19:51:58,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1171.8ms TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:51:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-07-13 19:51:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 843. [2021-07-13 19:51:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.369358669833729) internal successors, (1995), 842 states have internal predecessors, (1995), 0 states have call successors, (0), 0 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 19:51:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1995 transitions. [2021-07-13 19:51:58,709 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1995 transitions. Word has length 29 [2021-07-13 19:51:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:58,709 INFO L482 AbstractCegarLoop]: Abstraction has 843 states and 1995 transitions. [2021-07-13 19:51:58,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1995 transitions. [2021-07-13 19:51:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:51:58,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:58,711 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:58,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 19:51:58,917 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:58,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:58,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1183083592, now seen corresponding path program 45 times [2021-07-13 19:51:58,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:58,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73904784] [2021-07-13 19:51:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:59,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:59,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73904784] [2021-07-13 19:51:59,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73904784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:59,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5783737] [2021-07-13 19:51:59,181 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:59,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:59,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:59,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:51:59,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:59,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:51:59,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 19:51:59,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:59,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:59,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:59,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-07-13 19:51:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:59,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5783737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:59,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:59,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:51:59,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886578929] [2021-07-13 19:51:59,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:51:59,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:51:59,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:51:59,413 INFO L87 Difference]: Start difference. First operand 843 states and 1995 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:00,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:00,254 INFO L93 Difference]: Finished difference Result 1963 states and 4750 transitions. [2021-07-13 19:52:00,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:52:00,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:00,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:00,257 INFO L225 Difference]: With dead ends: 1963 [2021-07-13 19:52:00,257 INFO L226 Difference]: Without dead ends: 1953 [2021-07-13 19:52:00,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 700.9ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:52:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-07-13 19:52:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 837. [2021-07-13 19:52:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.3696172248803826) internal successors, (1981), 836 states have internal predecessors, (1981), 0 states have call successors, (0), 0 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 19:52:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1981 transitions. [2021-07-13 19:52:00,271 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1981 transitions. Word has length 29 [2021-07-13 19:52:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:00,271 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 1981 transitions. [2021-07-13 19:52:00,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1981 transitions. [2021-07-13 19:52:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:00,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:00,272 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:00,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:00,473 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1143680588, now seen corresponding path program 46 times [2021-07-13 19:52:00,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:00,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302078191] [2021-07-13 19:52:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:00,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:00,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302078191] [2021-07-13 19:52:00,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302078191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:00,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632462202] [2021-07-13 19:52:00,816 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:00,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:00,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:01,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:01,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 19:52:01,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:01,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:01,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:01,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-07-13 19:52:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:01,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632462202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:01,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:01,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:52:01,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652760606] [2021-07-13 19:52:01,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:52:01,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:01,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:52:01,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:01,100 INFO L87 Difference]: Start difference. First operand 837 states and 1981 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:02,534 INFO L93 Difference]: Finished difference Result 2002 states and 4888 transitions. [2021-07-13 19:52:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:52:02,535 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:02,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:02,537 INFO L225 Difference]: With dead ends: 2002 [2021-07-13 19:52:02,537 INFO L226 Difference]: Without dead ends: 1985 [2021-07-13 19:52:02,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1279.3ms TimeCoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:52:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-07-13 19:52:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 858. [2021-07-13 19:52:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.371061843640607) internal successors, (2032), 857 states have internal predecessors, (2032), 0 states have call successors, (0), 0 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 19:52:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2032 transitions. [2021-07-13 19:52:02,550 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2032 transitions. Word has length 29 [2021-07-13 19:52:02,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:02,550 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2032 transitions. [2021-07-13 19:52:02,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:02,550 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2032 transitions. [2021-07-13 19:52:02,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:02,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:02,551 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:02,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:02,752 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:02,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:02,752 INFO L82 PathProgramCache]: Analyzing trace with hash -964163148, now seen corresponding path program 47 times [2021-07-13 19:52:02,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:02,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294455983] [2021-07-13 19:52:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:03,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:03,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294455983] [2021-07-13 19:52:03,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294455983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:03,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101691517] [2021-07-13 19:52:03,086 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:03,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:52:03,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:03,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:03,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:03,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:52:03,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:03,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:03,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:03,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:52:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:03,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101691517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:03,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:03,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:52:03,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700924107] [2021-07-13 19:52:03,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:52:03,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:03,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:52:03,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:03,310 INFO L87 Difference]: Start difference. First operand 858 states and 2032 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:05,163 INFO L93 Difference]: Finished difference Result 2515 states and 6171 transitions. [2021-07-13 19:52:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:52:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:05,166 INFO L225 Difference]: With dead ends: 2515 [2021-07-13 19:52:05,166 INFO L226 Difference]: Without dead ends: 2500 [2021-07-13 19:52:05,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1620.7ms TimeCoverageRelationStatistics Valid=495, Invalid=2157, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:52:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-07-13 19:52:05,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 870. [2021-07-13 19:52:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 2.3716915995397008) internal successors, (2061), 869 states have internal predecessors, (2061), 0 states have call successors, (0), 0 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 19:52:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2061 transitions. [2021-07-13 19:52:05,180 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2061 transitions. Word has length 29 [2021-07-13 19:52:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:05,180 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2061 transitions. [2021-07-13 19:52:05,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2061 transitions. [2021-07-13 19:52:05,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:05,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:05,182 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:05,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-13 19:52:05,383 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:05,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:05,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1098964556, now seen corresponding path program 48 times [2021-07-13 19:52:05,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:05,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971906314] [2021-07-13 19:52:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:05,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:05,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971906314] [2021-07-13 19:52:05,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971906314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:05,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608027675] [2021-07-13 19:52:05,718 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:05,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:05,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:05,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:05,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:05,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:52:05,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:05,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:05,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:05,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:52:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:05,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608027675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:05,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:05,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:52:05,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377518514] [2021-07-13 19:52:05,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:52:05,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:05,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:52:05,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:05,917 INFO L87 Difference]: Start difference. First operand 870 states and 2061 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:52:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:07,258 INFO L93 Difference]: Finished difference Result 2120 states and 5191 transitions. [2021-07-13 19:52:07,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:52:07,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:07,263 INFO L225 Difference]: With dead ends: 2120 [2021-07-13 19:52:07,263 INFO L226 Difference]: Without dead ends: 2101 [2021-07-13 19:52:07,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1105.9ms TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:52:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-07-13 19:52:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 859. [2021-07-13 19:52:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.3729603729603728) internal successors, (2036), 858 states have internal predecessors, (2036), 0 states have call successors, (0), 0 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 19:52:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2036 transitions. [2021-07-13 19:52:07,280 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2036 transitions. Word has length 29 [2021-07-13 19:52:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:07,280 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2036 transitions. [2021-07-13 19:52:07,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:52:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2036 transitions. [2021-07-13 19:52:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:07,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:07,281 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:07,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:07,482 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:07,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:07,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1194528790, now seen corresponding path program 49 times [2021-07-13 19:52:07,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:07,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455337379] [2021-07-13 19:52:07,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:07,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:07,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455337379] [2021-07-13 19:52:07,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455337379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:07,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121320238] [2021-07-13 19:52:07,788 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:07,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:07,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:07,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:52:07,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:07,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:07,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:07,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:52:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:07,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121320238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:07,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:07,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 19:52:07,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040943853] [2021-07-13 19:52:07,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:52:07,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:07,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:52:07,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:52:07,998 INFO L87 Difference]: Start difference. First operand 859 states and 2036 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:52:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:09,181 INFO L93 Difference]: Finished difference Result 2618 states and 6519 transitions. [2021-07-13 19:52:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:52:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:09,184 INFO L225 Difference]: With dead ends: 2618 [2021-07-13 19:52:09,184 INFO L226 Difference]: Without dead ends: 2604 [2021-07-13 19:52:09,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1090.4ms TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:52:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-07-13 19:52:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 876. [2021-07-13 19:52:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.3771428571428572) internal successors, (2080), 875 states have internal predecessors, (2080), 0 states have call successors, (0), 0 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 19:52:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2080 transitions. [2021-07-13 19:52:09,200 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2080 transitions. Word has length 29 [2021-07-13 19:52:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:09,200 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2080 transitions. [2021-07-13 19:52:09,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:52:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2080 transitions. [2021-07-13 19:52:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:09,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:09,201 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:09,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-13 19:52:09,402 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:09,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:09,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1344037456, now seen corresponding path program 50 times [2021-07-13 19:52:09,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:09,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29688696] [2021-07-13 19:52:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:09,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:09,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29688696] [2021-07-13 19:52:09,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29688696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:09,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100213338] [2021-07-13 19:52:09,669 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:09,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:09,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:09,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:09,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:09,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:52:09,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:09,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:09,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:09,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:52:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:09,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100213338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:09,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:09,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 19:52:09,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547327562] [2021-07-13 19:52:09,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:52:09,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:09,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:52:09,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:52:09,868 INFO L87 Difference]: Start difference. First operand 876 states and 2080 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:52:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:10,976 INFO L93 Difference]: Finished difference Result 2322 states and 5745 transitions. [2021-07-13 19:52:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:52:10,976 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:10,979 INFO L225 Difference]: With dead ends: 2322 [2021-07-13 19:52:10,979 INFO L226 Difference]: Without dead ends: 2305 [2021-07-13 19:52:10,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 985.1ms TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:52:10,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-07-13 19:52:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 860. [2021-07-13 19:52:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.377182770663562) internal successors, (2042), 859 states have internal predecessors, (2042), 0 states have call successors, (0), 0 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 19:52:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2042 transitions. [2021-07-13 19:52:10,998 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2042 transitions. Word has length 29 [2021-07-13 19:52:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:10,998 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2042 transitions. [2021-07-13 19:52:10,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:52:10,998 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2042 transitions. [2021-07-13 19:52:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:10,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:10,999 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:11,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 19:52:11,200 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:11,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:11,200 INFO L82 PathProgramCache]: Analyzing trace with hash 184916612, now seen corresponding path program 51 times [2021-07-13 19:52:11,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:11,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659438920] [2021-07-13 19:52:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:11,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:11,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659438920] [2021-07-13 19:52:11,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659438920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:11,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532724883] [2021-07-13 19:52:11,434 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:11,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:52:11,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:11,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:52:11,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:11,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:11,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-13 19:52:11,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:11,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:11,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:11,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:130 [2021-07-13 19:52:12,116 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-07-13 19:52:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:12,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532724883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:12,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:12,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:52:12,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099537467] [2021-07-13 19:52:12,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:52:12,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:12,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:52:12,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:52:12,151 INFO L87 Difference]: Start difference. First operand 860 states and 2042 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:15,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:15,246 INFO L93 Difference]: Finished difference Result 2092 states and 5108 transitions. [2021-07-13 19:52:15,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:52:15,247 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:15,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:15,249 INFO L225 Difference]: With dead ends: 2092 [2021-07-13 19:52:15,250 INFO L226 Difference]: Without dead ends: 2079 [2021-07-13 19:52:15,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2569.9ms TimeCoverageRelationStatistics Valid=462, Invalid=3320, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:52:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-07-13 19:52:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 864. [2021-07-13 19:52:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.3800695249130936) internal successors, (2054), 863 states have internal predecessors, (2054), 0 states have call successors, (0), 0 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 19:52:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2054 transitions. [2021-07-13 19:52:15,269 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2054 transitions. Word has length 29 [2021-07-13 19:52:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:15,269 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2054 transitions. [2021-07-13 19:52:15,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2054 transitions. [2021-07-13 19:52:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:15,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:15,271 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:15,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 19:52:15,493 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash -586222012, now seen corresponding path program 52 times [2021-07-13 19:52:15,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:15,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395681146] [2021-07-13 19:52:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:15,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395681146] [2021-07-13 19:52:15,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395681146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304107112] [2021-07-13 19:52:15,705 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:15,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:15,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:15,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:15,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:15,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:52:15,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:15,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:15,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:15,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:52:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:15,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304107112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:15,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:15,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-13 19:52:15,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101746515] [2021-07-13 19:52:15,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:52:15,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:15,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:52:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:15,956 INFO L87 Difference]: Start difference. First operand 864 states and 2054 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 19:52:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:17,192 INFO L93 Difference]: Finished difference Result 2146 states and 5242 transitions. [2021-07-13 19:52:17,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:52:17,192 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:17,195 INFO L225 Difference]: With dead ends: 2146 [2021-07-13 19:52:17,195 INFO L226 Difference]: Without dead ends: 2136 [2021-07-13 19:52:17,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 826.3ms TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:52:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-07-13 19:52:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 857. [2021-07-13 19:52:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.3773364485981308) internal successors, (2035), 856 states have internal predecessors, (2035), 0 states have call successors, (0), 0 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 19:52:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2035 transitions. [2021-07-13 19:52:17,207 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2035 transitions. Word has length 29 [2021-07-13 19:52:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:17,207 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2035 transitions. [2021-07-13 19:52:17,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 19:52:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2035 transitions. [2021-07-13 19:52:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:17,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:17,208 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:17,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 19:52:17,409 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:17,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1488068002, now seen corresponding path program 53 times [2021-07-13 19:52:17,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:17,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906200166] [2021-07-13 19:52:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:17,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:17,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906200166] [2021-07-13 19:52:17,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906200166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:17,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797587603] [2021-07-13 19:52:17,666 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:17,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:52:17,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:17,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:17,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:17,886 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-07-13 19:52:17,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-07-13 19:52:17,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:17,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:17,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:17,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:19 [2021-07-13 19:52:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:17,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797587603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:17,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:17,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:52:17,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822168746] [2021-07-13 19:52:17,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:52:17,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:17,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:52:17,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:17,940 INFO L87 Difference]: Start difference. First operand 857 states and 2035 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:19,509 INFO L93 Difference]: Finished difference Result 2191 states and 5325 transitions. [2021-07-13 19:52:19,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:52:19,510 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:19,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:19,513 INFO L225 Difference]: With dead ends: 2191 [2021-07-13 19:52:19,513 INFO L226 Difference]: Without dead ends: 2174 [2021-07-13 19:52:19,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1218.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:52:19,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-07-13 19:52:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 875. [2021-07-13 19:52:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.3821510297482837) internal successors, (2082), 874 states have internal predecessors, (2082), 0 states have call successors, (0), 0 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 19:52:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2082 transitions. [2021-07-13 19:52:19,526 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2082 transitions. Word has length 29 [2021-07-13 19:52:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:19,526 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2082 transitions. [2021-07-13 19:52:19,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2082 transitions. [2021-07-13 19:52:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:19,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:19,527 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:19,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 19:52:19,728 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:19,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:19,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1308550562, now seen corresponding path program 54 times [2021-07-13 19:52:19,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:19,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639800817] [2021-07-13 19:52:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:20,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:20,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639800817] [2021-07-13 19:52:20,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639800817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:20,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370775680] [2021-07-13 19:52:20,006 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:20,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:20,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:20,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:52:20,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:20,233 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-07-13 19:52:20,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 62 [2021-07-13 19:52:20,236 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:20,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:20,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:20,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:96, output treesize:10 [2021-07-13 19:52:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:20,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370775680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:20,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:20,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:52:20,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460351228] [2021-07-13 19:52:20,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:52:20,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:20,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:52:20,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:20,304 INFO L87 Difference]: Start difference. First operand 875 states and 2082 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:22,270 INFO L93 Difference]: Finished difference Result 2635 states and 6476 transitions. [2021-07-13 19:52:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:52:22,271 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:22,275 INFO L225 Difference]: With dead ends: 2635 [2021-07-13 19:52:22,275 INFO L226 Difference]: Without dead ends: 2622 [2021-07-13 19:52:22,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1660.1ms TimeCoverageRelationStatistics Valid=481, Invalid=2069, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:52:22,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-07-13 19:52:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 891. [2021-07-13 19:52:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.385393258426966) internal successors, (2123), 890 states have internal predecessors, (2123), 0 states have call successors, (0), 0 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 19:52:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2123 transitions. [2021-07-13 19:52:22,297 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2123 transitions. Word has length 29 [2021-07-13 19:52:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:22,297 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 2123 transitions. [2021-07-13 19:52:22,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2123 transitions. [2021-07-13 19:52:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:22,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:22,299 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:22,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-13 19:52:22,513 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:22,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1443351970, now seen corresponding path program 55 times [2021-07-13 19:52:22,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:22,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586956103] [2021-07-13 19:52:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:22,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:22,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586956103] [2021-07-13 19:52:22,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586956103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:22,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075058749] [2021-07-13 19:52:22,788 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:22,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:22,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:23,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:23,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:52:23,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:23,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:23,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:23,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:52:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:23,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075058749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:23,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:23,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:52:23,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919857535] [2021-07-13 19:52:23,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:52:23,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:23,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:52:23,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:23,048 INFO L87 Difference]: Start difference. First operand 891 states and 2123 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:52:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:24,115 INFO L93 Difference]: Finished difference Result 2228 states and 5467 transitions. [2021-07-13 19:52:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:52:24,116 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:24,118 INFO L225 Difference]: With dead ends: 2228 [2021-07-13 19:52:24,120 INFO L226 Difference]: Without dead ends: 2210 [2021-07-13 19:52:24,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 982.5ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:52:24,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-07-13 19:52:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 864. [2021-07-13 19:52:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.381228273464658) internal successors, (2055), 863 states have internal predecessors, (2055), 0 states have call successors, (0), 0 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 19:52:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2055 transitions. [2021-07-13 19:52:24,140 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2055 transitions. Word has length 29 [2021-07-13 19:52:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:24,140 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2055 transitions. [2021-07-13 19:52:24,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:52:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2055 transitions. [2021-07-13 19:52:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:24,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:24,142 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:24,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:24,365 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:24,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:24,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1301042010, now seen corresponding path program 56 times [2021-07-13 19:52:24,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:24,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302667616] [2021-07-13 19:52:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:24,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:24,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302667616] [2021-07-13 19:52:24,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302667616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:24,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031350658] [2021-07-13 19:52:24,594 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:24,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:24,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:24,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:24,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:24,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:52:24,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:24,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:24,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:24,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:52:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:24,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031350658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:24,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:24,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:52:24,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731934602] [2021-07-13 19:52:24,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:52:24,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:24,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:52:24,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:24,828 INFO L87 Difference]: Start difference. First operand 864 states and 2055 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:25,831 INFO L93 Difference]: Finished difference Result 2015 states and 4908 transitions. [2021-07-13 19:52:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:52:25,831 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:25,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:25,833 INFO L225 Difference]: With dead ends: 2015 [2021-07-13 19:52:25,834 INFO L226 Difference]: Without dead ends: 2006 [2021-07-13 19:52:25,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 773.9ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:52:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-07-13 19:52:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 866. [2021-07-13 19:52:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.3791907514450865) internal successors, (2058), 865 states have internal predecessors, (2058), 0 states have call successors, (0), 0 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 19:52:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2058 transitions. [2021-07-13 19:52:25,845 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2058 transitions. Word has length 29 [2021-07-13 19:52:25,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:25,846 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2058 transitions. [2021-07-13 19:52:25,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2058 transitions. [2021-07-13 19:52:25,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:25,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:25,847 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:26,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 19:52:26,047 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:26,048 INFO L82 PathProgramCache]: Analyzing trace with hash 880815196, now seen corresponding path program 57 times [2021-07-13 19:52:26,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:26,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154840817] [2021-07-13 19:52:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:26,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:26,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154840817] [2021-07-13 19:52:26,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154840817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:26,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027086771] [2021-07-13 19:52:26,254 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:26,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:52:26,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:26,278 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:52:26,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:26,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:52:26,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:26,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:26,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:26,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:52:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:26,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027086771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:26,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:26,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-13 19:52:26,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983159429] [2021-07-13 19:52:26,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:52:26,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:26,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:52:26,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:26,529 INFO L87 Difference]: Start difference. First operand 866 states and 2058 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:27,470 INFO L93 Difference]: Finished difference Result 2129 states and 5184 transitions. [2021-07-13 19:52:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:52:27,470 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:27,473 INFO L225 Difference]: With dead ends: 2129 [2021-07-13 19:52:27,473 INFO L226 Difference]: Without dead ends: 2120 [2021-07-13 19:52:27,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 661.8ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:52:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-07-13 19:52:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 902. [2021-07-13 19:52:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 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 19:52:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-07-13 19:52:27,492 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-07-13 19:52:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:27,493 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-07-13 19:52:27,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:27,493 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-07-13 19:52:27,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:27,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:27,494 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:27,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:27,716 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:27,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash 591087582, now seen corresponding path program 58 times [2021-07-13 19:52:27,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:27,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81830459] [2021-07-13 19:52:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:27,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:27,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81830459] [2021-07-13 19:52:27,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81830459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:27,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164880438] [2021-07-13 19:52:27,962 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:28,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:28,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:28,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:28,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:28,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:28,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 19:52:28,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:28,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:28,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:28,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-07-13 19:52:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:28,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164880438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:28,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:28,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:52:28,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289892765] [2021-07-13 19:52:28,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:52:28,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:28,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:52:28,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:28,257 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:29,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:29,400 INFO L93 Difference]: Finished difference Result 2272 states and 5520 transitions. [2021-07-13 19:52:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:52:29,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:29,403 INFO L225 Difference]: With dead ends: 2272 [2021-07-13 19:52:29,403 INFO L226 Difference]: Without dead ends: 2255 [2021-07-13 19:52:29,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 885.4ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:52:29,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-07-13 19:52:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 920. [2021-07-13 19:52:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.381936887921654) internal successors, (2189), 919 states have internal predecessors, (2189), 0 states have call successors, (0), 0 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 19:52:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2189 transitions. [2021-07-13 19:52:29,417 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2189 transitions. Word has length 29 [2021-07-13 19:52:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:29,417 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2189 transitions. [2021-07-13 19:52:29,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2189 transitions. [2021-07-13 19:52:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:29,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:29,419 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:29,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-07-13 19:52:29,619 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1010370532, now seen corresponding path program 59 times [2021-07-13 19:52:29,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:29,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199791188] [2021-07-13 19:52:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:29,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:29,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199791188] [2021-07-13 19:52:29,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199791188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:29,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332768732] [2021-07-13 19:52:29,867 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:29,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:52:29,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:29,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:29,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:30,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:30,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:52:30,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:30,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:30,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:30,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:52:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:30,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332768732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:30,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:30,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:52:30,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969273231] [2021-07-13 19:52:30,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:52:30,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:30,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:52:30,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:30,132 INFO L87 Difference]: Start difference. First operand 920 states and 2189 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:31,565 INFO L93 Difference]: Finished difference Result 2706 states and 6630 transitions. [2021-07-13 19:52:31,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:52:31,565 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:31,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:31,569 INFO L225 Difference]: With dead ends: 2706 [2021-07-13 19:52:31,569 INFO L226 Difference]: Without dead ends: 2693 [2021-07-13 19:52:31,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1057.5ms TimeCoverageRelationStatistics Valid=357, Invalid=1283, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:52:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-13 19:52:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 936. [2021-07-13 19:52:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 2.3850267379679146) internal successors, (2230), 935 states have internal predecessors, (2230), 0 states have call successors, (0), 0 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 19:52:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 2230 transitions. [2021-07-13 19:52:31,591 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 2230 transitions. Word has length 29 [2021-07-13 19:52:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:31,592 INFO L482 AbstractCegarLoop]: Abstraction has 936 states and 2230 transitions. [2021-07-13 19:52:31,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 2230 transitions. [2021-07-13 19:52:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:31,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:31,593 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:31,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:31,809 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:31,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1145171940, now seen corresponding path program 60 times [2021-07-13 19:52:31,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:31,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973382268] [2021-07-13 19:52:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:32,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:32,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973382268] [2021-07-13 19:52:32,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973382268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:32,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161182034] [2021-07-13 19:52:32,051 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:32,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:52:32,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:32,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:52:32,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:32,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:32,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:52:32,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:32,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:32,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:32,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:137 [2021-07-13 19:52:32,708 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-07-13 19:52:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:32,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161182034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:32,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:32,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:52:32,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089862148] [2021-07-13 19:52:32,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:52:32,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:52:32,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:52:32,743 INFO L87 Difference]: Start difference. First operand 936 states and 2230 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:52:34,489 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-07-13 19:52:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:34,818 INFO L93 Difference]: Finished difference Result 2169 states and 5302 transitions. [2021-07-13 19:52:34,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:52:34,818 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:34,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:34,821 INFO L225 Difference]: With dead ends: 2169 [2021-07-13 19:52:34,821 INFO L226 Difference]: Without dead ends: 2150 [2021-07-13 19:52:34,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1895.2ms TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:52:34,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-07-13 19:52:34,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 905. [2021-07-13 19:52:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 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 19:52:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-07-13 19:52:34,834 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-07-13 19:52:34,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:34,835 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-07-13 19:52:34,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:52:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-07-13 19:52:34,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:34,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:34,836 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:35,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:35,037 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:35,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:35,037 INFO L82 PathProgramCache]: Analyzing trace with hash -681846126, now seen corresponding path program 61 times [2021-07-13 19:52:35,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:35,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827223232] [2021-07-13 19:52:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:35,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:35,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827223232] [2021-07-13 19:52:35,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827223232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:35,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765581982] [2021-07-13 19:52:35,259 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:35,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:35,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:35,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:52:35,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:35,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:35,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:35,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:52:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:35,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765581982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:35,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:35,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:52:35,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342916566] [2021-07-13 19:52:35,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:52:35,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:52:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:35,510 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:36,469 INFO L93 Difference]: Finished difference Result 2101 states and 5115 transitions. [2021-07-13 19:52:36,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:52:36,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:36,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:36,472 INFO L225 Difference]: With dead ends: 2101 [2021-07-13 19:52:36,472 INFO L226 Difference]: Without dead ends: 2092 [2021-07-13 19:52:36,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 685.0ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:52:36,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-07-13 19:52:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 902. [2021-07-13 19:52:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 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 19:52:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-07-13 19:52:36,485 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-07-13 19:52:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:36,485 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-07-13 19:52:36,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-07-13 19:52:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:36,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:36,486 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:36,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:36,687 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:36,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:36,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1761554114, now seen corresponding path program 62 times [2021-07-13 19:52:36,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:36,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515880419] [2021-07-13 19:52:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:36,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:36,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515880419] [2021-07-13 19:52:36,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515880419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:36,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424964663] [2021-07-13 19:52:36,983 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:37,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:37,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:37,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:37,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:37,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:37,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 19:52:37,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:37,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:37,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:37,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-07-13 19:52:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:37,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424964663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:37,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:37,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:52:37,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553415126] [2021-07-13 19:52:37,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:52:37,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:37,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:52:37,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:37,241 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:38,564 INFO L93 Difference]: Finished difference Result 2094 states and 5113 transitions. [2021-07-13 19:52:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:52:38,565 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:38,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:38,567 INFO L225 Difference]: With dead ends: 2094 [2021-07-13 19:52:38,567 INFO L226 Difference]: Without dead ends: 2077 [2021-07-13 19:52:38,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1085.9ms TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:52:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-07-13 19:52:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 923. [2021-07-13 19:52:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.3817787418655096) internal successors, (2196), 922 states have internal predecessors, (2196), 0 states have call successors, (0), 0 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 19:52:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2196 transitions. [2021-07-13 19:52:38,580 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2196 transitions. Word has length 29 [2021-07-13 19:52:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:38,580 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2196 transitions. [2021-07-13 19:52:38,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:38,580 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2196 transitions. [2021-07-13 19:52:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:38,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:38,581 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:38,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 19:52:38,782 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:38,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1941071554, now seen corresponding path program 63 times [2021-07-13 19:52:38,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:38,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958531203] [2021-07-13 19:52:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:39,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:39,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958531203] [2021-07-13 19:52:39,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958531203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:39,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884988429] [2021-07-13 19:52:39,048 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:39,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:52:39,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:39,071 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:52:39,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:39,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:39,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:39,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:39,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 19:52:39,325 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:39,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:39,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:39,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:29 [2021-07-13 19:52:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:39,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884988429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:39,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:39,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-07-13 19:52:39,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438647769] [2021-07-13 19:52:39,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:52:39,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:39,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:52:39,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:52:39,458 INFO L87 Difference]: Start difference. First operand 923 states and 2196 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:41,872 INFO L93 Difference]: Finished difference Result 2840 states and 6990 transitions. [2021-07-13 19:52:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:52:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:41,876 INFO L225 Difference]: With dead ends: 2840 [2021-07-13 19:52:41,876 INFO L226 Difference]: Without dead ends: 2829 [2021-07-13 19:52:41,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1913.0ms TimeCoverageRelationStatistics Valid=583, Invalid=2957, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:52:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2021-07-13 19:52:41,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 948. [2021-07-13 19:52:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 2.3896515311510034) internal successors, (2263), 947 states have internal predecessors, (2263), 0 states have call successors, (0), 0 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 19:52:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2263 transitions. [2021-07-13 19:52:41,891 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2263 transitions. Word has length 29 [2021-07-13 19:52:41,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:41,891 INFO L482 AbstractCegarLoop]: Abstraction has 948 states and 2263 transitions. [2021-07-13 19:52:41,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,891 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2263 transitions. [2021-07-13 19:52:41,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:41,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:41,893 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:42,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 19:52:42,093 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash 49869096, now seen corresponding path program 64 times [2021-07-13 19:52:42,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:42,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273724962] [2021-07-13 19:52:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:42,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:42,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273724962] [2021-07-13 19:52:42,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273724962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:42,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249156848] [2021-07-13 19:52:42,332 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:42,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:42,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:42,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:42,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:42,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:52:42,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:42,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:52:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249156848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:42,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:42,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:52:42,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068286149] [2021-07-13 19:52:42,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:52:42,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:42,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:52:42,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:42,541 INFO L87 Difference]: Start difference. First operand 948 states and 2263 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:52:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:43,702 INFO L93 Difference]: Finished difference Result 2439 states and 6018 transitions. [2021-07-13 19:52:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:52:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:43,705 INFO L225 Difference]: With dead ends: 2439 [2021-07-13 19:52:43,706 INFO L226 Difference]: Without dead ends: 2426 [2021-07-13 19:52:43,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 941.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:52:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-07-13 19:52:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 935. [2021-07-13 19:52:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3822269807280514) internal successors, (2225), 934 states have internal predecessors, (2225), 0 states have call successors, (0), 0 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 19:52:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2225 transitions. [2021-07-13 19:52:43,719 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2225 transitions. Word has length 29 [2021-07-13 19:52:43,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:43,719 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2225 transitions. [2021-07-13 19:52:43,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:52:43,719 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2225 transitions. [2021-07-13 19:52:43,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:43,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:43,720 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:43,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-13 19:52:43,921 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:43,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1806270146, now seen corresponding path program 65 times [2021-07-13 19:52:43,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:43,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54208031] [2021-07-13 19:52:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:44,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:44,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54208031] [2021-07-13 19:52:44,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54208031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:44,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568608855] [2021-07-13 19:52:44,155 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:44,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:52:44,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:44,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:44,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:44,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:52:44,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:44,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:52:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:44,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568608855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:44,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:44,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:52:44,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000269901] [2021-07-13 19:52:44,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:52:44,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:52:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:44,373 INFO L87 Difference]: Start difference. First operand 935 states and 2225 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:52:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:45,576 INFO L93 Difference]: Finished difference Result 2210 states and 5419 transitions. [2021-07-13 19:52:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:52:45,577 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:45,579 INFO L225 Difference]: With dead ends: 2210 [2021-07-13 19:52:45,579 INFO L226 Difference]: Without dead ends: 2191 [2021-07-13 19:52:45,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 911.9ms TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:52:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-07-13 19:52:45,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 914. [2021-07-13 19:52:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.380065717415115) internal successors, (2173), 913 states have internal predecessors, (2173), 0 states have call successors, (0), 0 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 19:52:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2173 transitions. [2021-07-13 19:52:45,592 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2173 transitions. Word has length 29 [2021-07-13 19:52:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:45,592 INFO L482 AbstractCegarLoop]: Abstraction has 914 states and 2173 transitions. [2021-07-13 19:52:45,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:52:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2173 transitions. [2021-07-13 19:52:45,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:45,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:45,594 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:45,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:45,797 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:45,797 INFO L82 PathProgramCache]: Analyzing trace with hash -195203804, now seen corresponding path program 66 times [2021-07-13 19:52:45,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:45,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760290926] [2021-07-13 19:52:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:46,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:46,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760290926] [2021-07-13 19:52:46,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760290926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:46,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552431479] [2021-07-13 19:52:46,020 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:46,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:46,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:46,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:52:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:46,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:46,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-13 19:52:46,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:46,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:46,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:46,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:107 [2021-07-13 19:52:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:46,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552431479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:46,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:46,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 19:52:46,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681264410] [2021-07-13 19:52:46,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:52:46,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:46,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:52:46,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:52:46,460 INFO L87 Difference]: Start difference. First operand 914 states and 2173 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 19:52:48,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:48,252 INFO L93 Difference]: Finished difference Result 2612 states and 6496 transitions. [2021-07-13 19:52:48,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:52:48,252 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:48,256 INFO L225 Difference]: With dead ends: 2612 [2021-07-13 19:52:48,256 INFO L226 Difference]: Without dead ends: 2603 [2021-07-13 19:52:48,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1430.5ms TimeCoverageRelationStatistics Valid=413, Invalid=1749, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:52:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-07-13 19:52:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 933. [2021-07-13 19:52:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.3873390557939915) internal successors, (2225), 932 states have internal predecessors, (2225), 0 states have call successors, (0), 0 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 19:52:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2225 transitions. [2021-07-13 19:52:48,271 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2225 transitions. Word has length 29 [2021-07-13 19:52:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:48,271 INFO L482 AbstractCegarLoop]: Abstraction has 933 states and 2225 transitions. [2021-07-13 19:52:48,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 19:52:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2225 transitions. [2021-07-13 19:52:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:48,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:48,274 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:48,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:48,496 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:48,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1561197246, now seen corresponding path program 67 times [2021-07-13 19:52:48,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:48,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763541543] [2021-07-13 19:52:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:48,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:48,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763541543] [2021-07-13 19:52:48,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763541543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:48,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770341435] [2021-07-13 19:52:48,771 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:48,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:48,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:49,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:49,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:52:49,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:49,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:49,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:49,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:52:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:49,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770341435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:49,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:49,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 19:52:49,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21745649] [2021-07-13 19:52:49,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:52:49,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:49,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:52:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:52:49,060 INFO L87 Difference]: Start difference. First operand 933 states and 2225 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:52:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:50,589 INFO L93 Difference]: Finished difference Result 2447 states and 6064 transitions. [2021-07-13 19:52:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:52:50,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:50,593 INFO L225 Difference]: With dead ends: 2447 [2021-07-13 19:52:50,593 INFO L226 Difference]: Without dead ends: 2433 [2021-07-13 19:52:50,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1311.7ms TimeCoverageRelationStatistics Valid=308, Invalid=1414, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:52:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-07-13 19:52:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 951. [2021-07-13 19:52:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 2.391578947368421) internal successors, (2272), 950 states have internal predecessors, (2272), 0 states have call successors, (0), 0 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 19:52:50,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 2272 transitions. [2021-07-13 19:52:50,607 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 2272 transitions. Word has length 29 [2021-07-13 19:52:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:50,607 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 2272 transitions. [2021-07-13 19:52:50,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:52:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 2272 transitions. [2021-07-13 19:52:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:50,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:50,609 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:50,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 19:52:50,809 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:50,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:50,809 INFO L82 PathProgramCache]: Analyzing trace with hash -812100692, now seen corresponding path program 68 times [2021-07-13 19:52:50,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:50,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183489292] [2021-07-13 19:52:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:51,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:51,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183489292] [2021-07-13 19:52:51,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183489292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:51,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461304236] [2021-07-13 19:52:51,033 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:51,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:51,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:51,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:51,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:51,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:52:51,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:51,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:52:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:51,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461304236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:51,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:51,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-13 19:52:51,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680487205] [2021-07-13 19:52:51,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:52:51,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:51,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:52:51,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:51,278 INFO L87 Difference]: Start difference. First operand 951 states and 2272 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:53,184 INFO L93 Difference]: Finished difference Result 2762 states and 6831 transitions. [2021-07-13 19:52:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:52:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:53,187 INFO L225 Difference]: With dead ends: 2762 [2021-07-13 19:52:53,187 INFO L226 Difference]: Without dead ends: 2745 [2021-07-13 19:52:53,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1559.5ms TimeCoverageRelationStatistics Valid=497, Invalid=1855, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:52:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-07-13 19:52:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 923. [2021-07-13 19:52:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.382863340563991) internal successors, (2197), 922 states have internal predecessors, (2197), 0 states have call successors, (0), 0 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 19:52:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2197 transitions. [2021-07-13 19:52:53,202 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2197 transitions. Word has length 29 [2021-07-13 19:52:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:53,202 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2197 transitions. [2021-07-13 19:52:53,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2197 transitions. [2021-07-13 19:52:53,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:53,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:53,204 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:53,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-07-13 19:52:53,404 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:53,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:53,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1204815982, now seen corresponding path program 69 times [2021-07-13 19:52:53,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:53,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006570588] [2021-07-13 19:52:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:53,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:53,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006570588] [2021-07-13 19:52:53,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006570588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:53,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885469865] [2021-07-13 19:52:53,635 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:53,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:52:53,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:53,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:52:53,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:53,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:53,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-13 19:52:53,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:53,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:53,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:220 [2021-07-13 19:52:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:54,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885469865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:54,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:54,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:52:54,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67342754] [2021-07-13 19:52:54,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:52:54,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:54,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:52:54,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:52:54,268 INFO L87 Difference]: Start difference. First operand 923 states and 2197 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:56,917 INFO L93 Difference]: Finished difference Result 2090 states and 5128 transitions. [2021-07-13 19:52:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:52:56,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:56,920 INFO L225 Difference]: With dead ends: 2090 [2021-07-13 19:52:56,920 INFO L226 Difference]: Without dead ends: 2080 [2021-07-13 19:52:56,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2282.6ms TimeCoverageRelationStatistics Valid=361, Invalid=2719, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:52:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-07-13 19:52:56,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 925. [2021-07-13 19:52:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.383116883116883) internal successors, (2202), 924 states have internal predecessors, (2202), 0 states have call successors, (0), 0 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 19:52:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2202 transitions. [2021-07-13 19:52:56,933 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2202 transitions. Word has length 29 [2021-07-13 19:52:56,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:56,934 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2202 transitions. [2021-07-13 19:52:56,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,934 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2202 transitions. [2021-07-13 19:52:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:56,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:56,935 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:57,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 19:52:57,136 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1923559344, now seen corresponding path program 70 times [2021-07-13 19:52:57,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:57,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238320209] [2021-07-13 19:52:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:57,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:57,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238320209] [2021-07-13 19:52:57,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238320209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:57,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689789749] [2021-07-13 19:52:57,362 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:57,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:57,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:57,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:57,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:57,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:57,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 19:52:57,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:57,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:57,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:57,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-07-13 19:52:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:57,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689789749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:57,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:57,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:52:57,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114922130] [2021-07-13 19:52:57,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:52:57,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:57,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:52:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:57,602 INFO L87 Difference]: Start difference. First operand 925 states and 2202 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:58,838 INFO L93 Difference]: Finished difference Result 2264 states and 5508 transitions. [2021-07-13 19:52:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:52:58,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:52:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:58,841 INFO L225 Difference]: With dead ends: 2264 [2021-07-13 19:52:58,841 INFO L226 Difference]: Without dead ends: 2247 [2021-07-13 19:52:58,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 966.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1132, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:52:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2021-07-13 19:52:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 943. [2021-07-13 19:52:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.387473460721868) internal successors, (2249), 942 states have internal predecessors, (2249), 0 states have call successors, (0), 0 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 19:52:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2249 transitions. [2021-07-13 19:52:58,855 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2249 transitions. Word has length 29 [2021-07-13 19:52:58,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:58,855 INFO L482 AbstractCegarLoop]: Abstraction has 943 states and 2249 transitions. [2021-07-13 19:52:58,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2249 transitions. [2021-07-13 19:52:58,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:52:58,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:58,856 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:59,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:59,057 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:59,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2103076784, now seen corresponding path program 71 times [2021-07-13 19:52:59,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:59,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773667094] [2021-07-13 19:52:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:59,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:59,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773667094] [2021-07-13 19:52:59,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773667094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:59,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620066588] [2021-07-13 19:52:59,271 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:59,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:52:59,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:59,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:52:59,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:52:59,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:52:59,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:59,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:59,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:59,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:52:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:59,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620066588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:59,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:59,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:52:59,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495053466] [2021-07-13 19:52:59,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:52:59,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:59,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:52:59,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:59,496 INFO L87 Difference]: Start difference. First operand 943 states and 2249 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:00,929 INFO L93 Difference]: Finished difference Result 2706 states and 6638 transitions. [2021-07-13 19:53:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:53:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:00,933 INFO L225 Difference]: With dead ends: 2706 [2021-07-13 19:53:00,933 INFO L226 Difference]: Without dead ends: 2693 [2021-07-13 19:53:00,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1127.7ms TimeCoverageRelationStatistics Valid=379, Invalid=1427, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:53:00,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-13 19:53:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 959. [2021-07-13 19:53:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.3903966597077244) internal successors, (2290), 958 states have internal predecessors, (2290), 0 states have call successors, (0), 0 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 19:53:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2290 transitions. [2021-07-13 19:53:00,949 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2290 transitions. Word has length 29 [2021-07-13 19:53:00,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:00,949 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 2290 transitions. [2021-07-13 19:53:00,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:00,949 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2290 transitions. [2021-07-13 19:53:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:00,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:00,950 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:01,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:01,153 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:01,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1968275376, now seen corresponding path program 72 times [2021-07-13 19:53:01,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:01,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045698532] [2021-07-13 19:53:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:01,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:01,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045698532] [2021-07-13 19:53:01,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045698532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:01,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741667811] [2021-07-13 19:53:01,386 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:01,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:53:01,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:01,411 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:53:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:01,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:01,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:53:01,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:01,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:01,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:01,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:70 [2021-07-13 19:53:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:01,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741667811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:01,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:01,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 19:53:01,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659643306] [2021-07-13 19:53:01,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:53:01,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:01,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:53:01,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:53:01,806 INFO L87 Difference]: Start difference. First operand 959 states and 2290 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:02,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:02,907 INFO L93 Difference]: Finished difference Result 2297 states and 5640 transitions. [2021-07-13 19:53:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:53:02,907 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:02,910 INFO L225 Difference]: With dead ends: 2297 [2021-07-13 19:53:02,910 INFO L226 Difference]: Without dead ends: 2279 [2021-07-13 19:53:02,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 936.9ms TimeCoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:53:02,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-07-13 19:53:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 962. [2021-07-13 19:53:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 2.3902185223725287) internal successors, (2297), 961 states have internal predecessors, (2297), 0 states have call successors, (0), 0 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 19:53:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 2297 transitions. [2021-07-13 19:53:02,923 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 2297 transitions. Word has length 29 [2021-07-13 19:53:02,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:02,923 INFO L482 AbstractCegarLoop]: Abstraction has 962 states and 2297 transitions. [2021-07-13 19:53:02,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:02,924 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 2297 transitions. [2021-07-13 19:53:02,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:02,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:02,925 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:03,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:03,126 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:03,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:03,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2110585336, now seen corresponding path program 73 times [2021-07-13 19:53:03,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:03,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942837482] [2021-07-13 19:53:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:03,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:03,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942837482] [2021-07-13 19:53:03,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942837482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:03,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132882644] [2021-07-13 19:53:03,327 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:03,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:03,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:03,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:03,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:03,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:03,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:03,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:53:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:03,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132882644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:03,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:03,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:53:03,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467021812] [2021-07-13 19:53:03,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:53:03,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:03,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:53:03,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:03,557 INFO L87 Difference]: Start difference. First operand 962 states and 2297 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:04,396 INFO L93 Difference]: Finished difference Result 2192 states and 5346 transitions. [2021-07-13 19:53:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:04,396 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:04,399 INFO L225 Difference]: With dead ends: 2192 [2021-07-13 19:53:04,400 INFO L226 Difference]: Without dead ends: 2183 [2021-07-13 19:53:04,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 647.2ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:53:04,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-07-13 19:53:04,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 957. [2021-07-13 19:53:04,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.3901673640167362) internal successors, (2285), 956 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 19:53:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2285 transitions. [2021-07-13 19:53:04,413 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2285 transitions. Word has length 29 [2021-07-13 19:53:04,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:04,413 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 2285 transitions. [2021-07-13 19:53:04,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,413 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2285 transitions. [2021-07-13 19:53:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:04,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:04,414 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:04,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:04,615 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:04,615 INFO L82 PathProgramCache]: Analyzing trace with hash 350102354, now seen corresponding path program 74 times [2021-07-13 19:53:04,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:04,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598129971] [2021-07-13 19:53:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:04,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:04,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598129971] [2021-07-13 19:53:04,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598129971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:04,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776828181] [2021-07-13 19:53:04,856 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:04,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:04,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:04,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:04,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:05,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:05,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:05,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:05,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:05,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:53:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:05,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776828181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:05,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:05,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-13 19:53:05,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595943018] [2021-07-13 19:53:05,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:53:05,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:05,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:53:05,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:05,090 INFO L87 Difference]: Start difference. First operand 957 states and 2285 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 19:53:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:06,454 INFO L93 Difference]: Finished difference Result 2260 states and 5544 transitions. [2021-07-13 19:53:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:53:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:06,457 INFO L225 Difference]: With dead ends: 2260 [2021-07-13 19:53:06,457 INFO L226 Difference]: Without dead ends: 2250 [2021-07-13 19:53:06,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:53:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2021-07-13 19:53:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 939. [2021-07-13 19:53:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.384861407249467) internal successors, (2237), 938 states have internal predecessors, (2237), 0 states have call successors, (0), 0 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 19:53:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2237 transitions. [2021-07-13 19:53:06,472 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2237 transitions. Word has length 29 [2021-07-13 19:53:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:06,472 INFO L482 AbstractCegarLoop]: Abstraction has 939 states and 2237 transitions. [2021-07-13 19:53:06,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 19:53:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2237 transitions. [2021-07-13 19:53:06,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:06,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:06,474 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:06,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:06,674 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:06,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1278166228, now seen corresponding path program 75 times [2021-07-13 19:53:06,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:06,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597303521] [2021-07-13 19:53:06,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:06,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:06,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597303521] [2021-07-13 19:53:06,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597303521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:06,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087439641] [2021-07-13 19:53:06,882 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:06,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:53:06,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:06,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:53:06,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:07,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:07,192 INFO L354 Elim1Store]: treesize reduction 25, result has 35.9 percent of original size [2021-07-13 19:53:07,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 58 [2021-07-13 19:53:07,194 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:07,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:07,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:07,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:95, output treesize:31 [2021-07-13 19:53:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:07,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087439641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:07,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:07,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-07-13 19:53:07,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752765261] [2021-07-13 19:53:07,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:53:07,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:07,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:53:07,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:53:07,311 INFO L87 Difference]: Start difference. First operand 939 states and 2237 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:08,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:08,988 INFO L93 Difference]: Finished difference Result 2209 states and 5419 transitions. [2021-07-13 19:53:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:53:08,989 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:08,992 INFO L225 Difference]: With dead ends: 2209 [2021-07-13 19:53:08,993 INFO L226 Difference]: Without dead ends: 2191 [2021-07-13 19:53:08,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1214.4ms TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:53:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-07-13 19:53:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 934. [2021-07-13 19:53:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 2.3815648445873525) internal successors, (2222), 933 states have internal predecessors, (2222), 0 states have call successors, (0), 0 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 19:53:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 2222 transitions. [2021-07-13 19:53:09,010 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 2222 transitions. Word has length 29 [2021-07-13 19:53:09,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:09,010 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 2222 transitions. [2021-07-13 19:53:09,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 2222 transitions. [2021-07-13 19:53:09,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:09,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:09,011 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:09,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:09,212 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:09,212 INFO L82 PathProgramCache]: Analyzing trace with hash 951421208, now seen corresponding path program 76 times [2021-07-13 19:53:09,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:09,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400883145] [2021-07-13 19:53:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:09,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:09,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400883145] [2021-07-13 19:53:09,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400883145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:09,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998373878] [2021-07-13 19:53:09,399 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:09,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:09,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:09,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:09,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:09,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:09,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:53:09,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:09,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:09,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:09,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:53:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:09,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998373878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:09,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:09,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:53:09,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037432877] [2021-07-13 19:53:09,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:53:09,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:09,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:53:09,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:09,612 INFO L87 Difference]: Start difference. First operand 934 states and 2222 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:10,646 INFO L93 Difference]: Finished difference Result 2317 states and 5688 transitions. [2021-07-13 19:53:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:53:10,646 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:10,649 INFO L225 Difference]: With dead ends: 2317 [2021-07-13 19:53:10,649 INFO L226 Difference]: Without dead ends: 2306 [2021-07-13 19:53:10,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 736.4ms TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:53:10,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-07-13 19:53:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 916. [2021-07-13 19:53:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.377049180327869) internal successors, (2175), 915 states have internal predecessors, (2175), 0 states have call successors, (0), 0 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 19:53:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 2175 transitions. [2021-07-13 19:53:10,663 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 2175 transitions. Word has length 29 [2021-07-13 19:53:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:10,663 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 2175 transitions. [2021-07-13 19:53:10,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 2175 transitions. [2021-07-13 19:53:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:10,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:10,664 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:10,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-13 19:53:10,866 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1905941980, now seen corresponding path program 77 times [2021-07-13 19:53:10,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:10,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888582437] [2021-07-13 19:53:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:11,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:11,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888582437] [2021-07-13 19:53:11,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888582437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:11,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893453597] [2021-07-13 19:53:11,107 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:11,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:53:11,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:11,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:53:11,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:11,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:11,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:11,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:11,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:11,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:53:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:11,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893453597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:11,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:11,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-13 19:53:11,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073244929] [2021-07-13 19:53:11,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:53:11,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:11,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:53:11,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:11,340 INFO L87 Difference]: Start difference. First operand 916 states and 2175 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:12,222 INFO L93 Difference]: Finished difference Result 2284 states and 5618 transitions. [2021-07-13 19:53:12,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:12,223 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:12,226 INFO L225 Difference]: With dead ends: 2284 [2021-07-13 19:53:12,226 INFO L226 Difference]: Without dead ends: 2275 [2021-07-13 19:53:12,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 713.6ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:53:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-07-13 19:53:12,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 937. [2021-07-13 19:53:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 2.3824786324786325) internal successors, (2230), 936 states have internal predecessors, (2230), 0 states have call successors, (0), 0 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 19:53:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2230 transitions. [2021-07-13 19:53:12,240 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2230 transitions. Word has length 29 [2021-07-13 19:53:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:12,240 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 2230 transitions. [2021-07-13 19:53:12,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2230 transitions. [2021-07-13 19:53:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:12,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:12,242 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:12,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:12,445 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:12,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2085459420, now seen corresponding path program 78 times [2021-07-13 19:53:12,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:12,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647726214] [2021-07-13 19:53:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:12,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:12,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647726214] [2021-07-13 19:53:12,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647726214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:12,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294900768] [2021-07-13 19:53:12,661 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:12,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:12,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:12,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:12,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:12,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:12,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:12,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:12,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:12,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:12,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294900768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:12,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:12,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 19:53:12,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992335472] [2021-07-13 19:53:12,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:53:12,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:12,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:53:12,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:53:12,871 INFO L87 Difference]: Start difference. First operand 937 states and 2230 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:53:13,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:13,611 INFO L93 Difference]: Finished difference Result 2314 states and 5715 transitions. [2021-07-13 19:53:13,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:53:13,612 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:13,615 INFO L225 Difference]: With dead ends: 2314 [2021-07-13 19:53:13,615 INFO L226 Difference]: Without dead ends: 2303 [2021-07-13 19:53:13,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 609.6ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:53:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-07-13 19:53:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 949. [2021-07-13 19:53:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 2.3839662447257384) internal successors, (2260), 948 states have internal predecessors, (2260), 0 states have call successors, (0), 0 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 19:53:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2260 transitions. [2021-07-13 19:53:13,635 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2260 transitions. Word has length 29 [2021-07-13 19:53:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:13,635 INFO L482 AbstractCegarLoop]: Abstraction has 949 states and 2260 transitions. [2021-07-13 19:53:13,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:53:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2260 transitions. [2021-07-13 19:53:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:13,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:13,637 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:13,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:13,841 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:13,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:13,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1950658012, now seen corresponding path program 79 times [2021-07-13 19:53:13,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:13,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548716052] [2021-07-13 19:53:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:14,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:14,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548716052] [2021-07-13 19:53:14,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548716052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:14,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550828624] [2021-07-13 19:53:14,060 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:14,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:14,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:14,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:53:14,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:14,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:14,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:14,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:53:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:14,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550828624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:14,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:14,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 19:53:14,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499736694] [2021-07-13 19:53:14,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:53:14,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:53:14,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:53:14,252 INFO L87 Difference]: Start difference. First operand 949 states and 2260 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:53:14,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:14,942 INFO L93 Difference]: Finished difference Result 2394 states and 5908 transitions. [2021-07-13 19:53:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:53:14,943 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:14,946 INFO L225 Difference]: With dead ends: 2394 [2021-07-13 19:53:14,946 INFO L226 Difference]: Without dead ends: 2374 [2021-07-13 19:53:14,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 596.9ms TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:53:14,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-07-13 19:53:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 928. [2021-07-13 19:53:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 2.3797195253505934) internal successors, (2206), 927 states have internal predecessors, (2206), 0 states have call successors, (0), 0 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 19:53:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2206 transitions. [2021-07-13 19:53:14,960 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2206 transitions. Word has length 29 [2021-07-13 19:53:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:14,960 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 2206 transitions. [2021-07-13 19:53:14,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:53:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2206 transitions. [2021-07-13 19:53:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:14,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:14,962 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:15,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:15,162 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:15,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:15,162 INFO L82 PathProgramCache]: Analyzing trace with hash 143297210, now seen corresponding path program 80 times [2021-07-13 19:53:15,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:15,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284393125] [2021-07-13 19:53:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:15,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:15,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284393125] [2021-07-13 19:53:15,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284393125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:15,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392139350] [2021-07-13 19:53:15,407 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:15,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:15,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:15,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:53:15,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:15,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:15,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:53:15,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:15,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:15,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:15,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:53:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:15,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392139350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:15,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:15,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:53:15,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7713730] [2021-07-13 19:53:15,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:53:15,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:15,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:53:15,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:15,610 INFO L87 Difference]: Start difference. First operand 928 states and 2206 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:16,850 INFO L93 Difference]: Finished difference Result 2305 states and 5672 transitions. [2021-07-13 19:53:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:53:16,850 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:16,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:16,853 INFO L225 Difference]: With dead ends: 2305 [2021-07-13 19:53:16,853 INFO L226 Difference]: Without dead ends: 2294 [2021-07-13 19:53:16,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1013.9ms TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:53:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-07-13 19:53:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 949. [2021-07-13 19:53:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 2.3839662447257384) internal successors, (2260), 948 states have internal predecessors, (2260), 0 states have call successors, (0), 0 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 19:53:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2260 transitions. [2021-07-13 19:53:16,866 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2260 transitions. Word has length 29 [2021-07-13 19:53:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:16,866 INFO L482 AbstractCegarLoop]: Abstraction has 949 states and 2260 transitions. [2021-07-13 19:53:16,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:16,867 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2260 transitions. [2021-07-13 19:53:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:16,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:16,868 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:17,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:17,082 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:17,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:17,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1899698260, now seen corresponding path program 81 times [2021-07-13 19:53:17,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:17,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624226300] [2021-07-13 19:53:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:17,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:17,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624226300] [2021-07-13 19:53:17,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624226300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:17,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669521096] [2021-07-13 19:53:17,315 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:17,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:53:17,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:17,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:17,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:17,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:17,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:17,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:17,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:17,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669521096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:17,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:17,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:53:17,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910795104] [2021-07-13 19:53:17,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:53:17,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:53:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:17,526 INFO L87 Difference]: Start difference. First operand 949 states and 2260 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:18,937 INFO L93 Difference]: Finished difference Result 2395 states and 5896 transitions. [2021-07-13 19:53:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:53:18,937 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:18,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:18,940 INFO L225 Difference]: With dead ends: 2395 [2021-07-13 19:53:18,940 INFO L226 Difference]: Without dead ends: 2375 [2021-07-13 19:53:18,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1067.2ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:53:18,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-07-13 19:53:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 937. [2021-07-13 19:53:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 2.3814102564102564) internal successors, (2229), 936 states have internal predecessors, (2229), 0 states have call successors, (0), 0 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 19:53:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2229 transitions. [2021-07-13 19:53:18,954 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2229 transitions. Word has length 29 [2021-07-13 19:53:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:18,954 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 2229 transitions. [2021-07-13 19:53:18,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2229 transitions. [2021-07-13 19:53:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:18,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:18,956 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:19,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:19,157 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash -866314968, now seen corresponding path program 82 times [2021-07-13 19:53:19,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:19,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629270473] [2021-07-13 19:53:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:19,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:19,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629270473] [2021-07-13 19:53:19,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629270473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:19,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485290299] [2021-07-13 19:53:19,395 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:19,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:19,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:19,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:19,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:19,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:19,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:19,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:19,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:19,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:53:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:19,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485290299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:19,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:19,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:53:19,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984434623] [2021-07-13 19:53:19,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:53:19,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:19,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:53:19,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:19,644 INFO L87 Difference]: Start difference. First operand 937 states and 2229 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:21,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:21,380 INFO L93 Difference]: Finished difference Result 2109 states and 5137 transitions. [2021-07-13 19:53:21,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:53:21,380 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:21,383 INFO L225 Difference]: With dead ends: 2109 [2021-07-13 19:53:21,383 INFO L226 Difference]: Without dead ends: 2086 [2021-07-13 19:53:21,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1158.7ms TimeCoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:53:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-07-13 19:53:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 919. [2021-07-13 19:53:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.3769063180827885) internal successors, (2182), 918 states have internal predecessors, (2182), 0 states have call successors, (0), 0 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 19:53:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2182 transitions. [2021-07-13 19:53:21,395 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2182 transitions. Word has length 29 [2021-07-13 19:53:21,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:21,395 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2182 transitions. [2021-07-13 19:53:21,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:21,395 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2182 transitions. [2021-07-13 19:53:21,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:21,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:21,397 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:21,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:21,597 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1290856278, now seen corresponding path program 83 times [2021-07-13 19:53:21,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:21,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040703748] [2021-07-13 19:53:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:21,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:21,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040703748] [2021-07-13 19:53:21,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040703748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:21,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657920318] [2021-07-13 19:53:21,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:21,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:53:21,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:21,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:21,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:21,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:53:21,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:21,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:21,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:21,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:53:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:21,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657920318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:21,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:21,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:53:21,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613787992] [2021-07-13 19:53:21,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:53:21,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:21,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:53:21,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:21,994 INFO L87 Difference]: Start difference. First operand 919 states and 2182 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:22,946 INFO L93 Difference]: Finished difference Result 2456 states and 6048 transitions. [2021-07-13 19:53:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:22,946 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:22,950 INFO L225 Difference]: With dead ends: 2456 [2021-07-13 19:53:22,950 INFO L226 Difference]: Without dead ends: 2445 [2021-07-13 19:53:22,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 737.6ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:53:22,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-07-13 19:53:22,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 953. [2021-07-13 19:53:22,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.3865546218487395) internal successors, (2272), 952 states have internal predecessors, (2272), 0 states have call successors, (0), 0 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 19:53:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2272 transitions. [2021-07-13 19:53:22,964 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2272 transitions. Word has length 29 [2021-07-13 19:53:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:22,965 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2272 transitions. [2021-07-13 19:53:22,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:22,965 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2272 transitions. [2021-07-13 19:53:22,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:22,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:22,966 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:23,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:23,166 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:23,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:23,167 INFO L82 PathProgramCache]: Analyzing trace with hash 465544772, now seen corresponding path program 84 times [2021-07-13 19:53:23,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:23,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020913048] [2021-07-13 19:53:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:23,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:23,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020913048] [2021-07-13 19:53:23,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020913048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:23,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462308359] [2021-07-13 19:53:23,359 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:23,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:23,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:23,383 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:53:23,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:23,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:23,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-07-13 19:53:23,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:23,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:23,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:23,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:145 [2021-07-13 19:53:23,807 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-07-13 19:53:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:23,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462308359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:23,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:23,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:53:23,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887548721] [2021-07-13 19:53:23,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:53:23,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:23,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:53:23,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:53:23,988 INFO L87 Difference]: Start difference. First operand 953 states and 2272 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:26,097 INFO L93 Difference]: Finished difference Result 2362 states and 5814 transitions. [2021-07-13 19:53:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:53:26,097 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:26,100 INFO L225 Difference]: With dead ends: 2362 [2021-07-13 19:53:26,100 INFO L226 Difference]: Without dead ends: 2349 [2021-07-13 19:53:26,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1673.8ms TimeCoverageRelationStatistics Valid=404, Invalid=2248, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:53:26,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-07-13 19:53:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 959. [2021-07-13 19:53:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.38517745302714) internal successors, (2285), 958 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 19:53:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2285 transitions. [2021-07-13 19:53:26,113 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2285 transitions. Word has length 29 [2021-07-13 19:53:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:26,113 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 2285 transitions. [2021-07-13 19:53:26,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2285 transitions. [2021-07-13 19:53:26,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:26,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:26,114 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:26,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:26,317 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash -452405418, now seen corresponding path program 85 times [2021-07-13 19:53:26,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:26,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480795851] [2021-07-13 19:53:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:26,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:26,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480795851] [2021-07-13 19:53:26,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480795851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:26,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980987061] [2021-07-13 19:53:26,512 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:26,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:26,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:26,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:26,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:26,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:26,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:26,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:26,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980987061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:26,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:26,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:53:26,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818032270] [2021-07-13 19:53:26,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:53:26,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:26,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:53:26,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:26,731 INFO L87 Difference]: Start difference. First operand 959 states and 2285 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:28,280 INFO L93 Difference]: Finished difference Result 2787 states and 6825 transitions. [2021-07-13 19:53:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:53:28,281 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:28,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:28,284 INFO L225 Difference]: With dead ends: 2787 [2021-07-13 19:53:28,284 INFO L226 Difference]: Without dead ends: 2769 [2021-07-13 19:53:28,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1244.1ms TimeCoverageRelationStatistics Valid=431, Invalid=1731, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:53:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-07-13 19:53:28,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 947. [2021-07-13 19:53:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 2.3816067653276956) internal successors, (2253), 946 states have internal predecessors, (2253), 0 states have call successors, (0), 0 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 19:53:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 2253 transitions. [2021-07-13 19:53:28,299 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 2253 transitions. Word has length 29 [2021-07-13 19:53:28,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:28,299 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 2253 transitions. [2021-07-13 19:53:28,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 2253 transitions. [2021-07-13 19:53:28,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:28,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:28,301 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:28,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-13 19:53:28,501 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:28,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1105795140, now seen corresponding path program 86 times [2021-07-13 19:53:28,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:28,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324258740] [2021-07-13 19:53:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:28,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:28,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324258740] [2021-07-13 19:53:28,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324258740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:28,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135163563] [2021-07-13 19:53:28,705 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:28,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:28,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:28,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:53:28,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:29,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:29,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-13 19:53:29,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:29,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:29,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:29,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:53 [2021-07-13 19:53:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:29,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135163563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:29,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:29,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:53:29,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857201201] [2021-07-13 19:53:29,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:53:29,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:29,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:53:29,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:53:29,155 INFO L87 Difference]: Start difference. First operand 947 states and 2253 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:30,741 INFO L93 Difference]: Finished difference Result 2333 states and 5666 transitions. [2021-07-13 19:53:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:53:30,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:30,745 INFO L225 Difference]: With dead ends: 2333 [2021-07-13 19:53:30,745 INFO L226 Difference]: Without dead ends: 2313 [2021-07-13 19:53:30,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1234.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:53:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-07-13 19:53:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 932. [2021-07-13 19:53:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.377013963480129) internal successors, (2213), 931 states have internal predecessors, (2213), 0 states have call successors, (0), 0 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 19:53:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2213 transitions. [2021-07-13 19:53:30,763 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2213 transitions. Word has length 29 [2021-07-13 19:53:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:30,764 INFO L482 AbstractCegarLoop]: Abstraction has 932 states and 2213 transitions. [2021-07-13 19:53:30,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:30,764 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2213 transitions. [2021-07-13 19:53:30,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:30,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:30,765 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:30,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:30,969 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1875927132, now seen corresponding path program 87 times [2021-07-13 19:53:30,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:30,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999371373] [2021-07-13 19:53:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:31,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:31,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999371373] [2021-07-13 19:53:31,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999371373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:31,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945606761] [2021-07-13 19:53:31,178 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:31,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:53:31,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:31,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:31,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:31,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:31,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:31,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:31,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:53:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:31,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945606761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:31,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:31,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:53:31,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873276867] [2021-07-13 19:53:31,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:53:31,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:31,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:53:31,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:31,427 INFO L87 Difference]: Start difference. First operand 932 states and 2213 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:32,337 INFO L93 Difference]: Finished difference Result 2112 states and 5131 transitions. [2021-07-13 19:53:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:53:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:32,340 INFO L225 Difference]: With dead ends: 2112 [2021-07-13 19:53:32,340 INFO L226 Difference]: Without dead ends: 2102 [2021-07-13 19:53:32,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 773.4ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:53:32,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-07-13 19:53:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 926. [2021-07-13 19:53:32,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 2.3772972972972974) internal successors, (2199), 925 states have internal predecessors, (2199), 0 states have call successors, (0), 0 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 19:53:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 2199 transitions. [2021-07-13 19:53:32,352 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 2199 transitions. Word has length 29 [2021-07-13 19:53:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:32,352 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 2199 transitions. [2021-07-13 19:53:32,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 2199 transitions. [2021-07-13 19:53:32,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:32,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:32,353 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:32,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:32,554 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:32,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:32,554 INFO L82 PathProgramCache]: Analyzing trace with hash -450837048, now seen corresponding path program 88 times [2021-07-13 19:53:32,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:32,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335128584] [2021-07-13 19:53:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:32,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:32,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335128584] [2021-07-13 19:53:32,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335128584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:32,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667874410] [2021-07-13 19:53:32,792 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:32,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:32,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:32,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:32,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:32,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:32,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:32,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:32,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:53:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:33,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667874410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:33,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:33,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:53:33,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108430803] [2021-07-13 19:53:33,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:53:33,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:33,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:53:33,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:33,026 INFO L87 Difference]: Start difference. First operand 926 states and 2199 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:34,410 INFO L93 Difference]: Finished difference Result 2114 states and 5165 transitions. [2021-07-13 19:53:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:53:34,411 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:34,414 INFO L225 Difference]: With dead ends: 2114 [2021-07-13 19:53:34,414 INFO L226 Difference]: Without dead ends: 2097 [2021-07-13 19:53:34,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1019.1ms TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:53:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-13 19:53:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 941. [2021-07-13 19:53:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 2.3819148936170214) internal successors, (2239), 940 states have internal predecessors, (2239), 0 states have call successors, (0), 0 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 19:53:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2239 transitions. [2021-07-13 19:53:34,432 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2239 transitions. Word has length 29 [2021-07-13 19:53:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:34,432 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 2239 transitions. [2021-07-13 19:53:34,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2239 transitions. [2021-07-13 19:53:34,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:34,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:34,434 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:34,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:34,642 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:34,642 INFO L82 PathProgramCache]: Analyzing trace with hash -271319608, now seen corresponding path program 89 times [2021-07-13 19:53:34,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:34,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93439584] [2021-07-13 19:53:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:34,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:34,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93439584] [2021-07-13 19:53:34,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93439584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:34,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794693774] [2021-07-13 19:53:34,886 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:34,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:53:34,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:34,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:34,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:35,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:35,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:35,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:35,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:35,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:35,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794693774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:35,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:35,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:53:35,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576592933] [2021-07-13 19:53:35,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:53:35,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:53:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:35,087 INFO L87 Difference]: Start difference. First operand 941 states and 2239 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:36,623 INFO L93 Difference]: Finished difference Result 2635 states and 6476 transitions. [2021-07-13 19:53:36,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:53:36,623 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:36,626 INFO L225 Difference]: With dead ends: 2635 [2021-07-13 19:53:36,627 INFO L226 Difference]: Without dead ends: 2620 [2021-07-13 19:53:36,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1304.5ms TimeCoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:53:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2021-07-13 19:53:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 953. [2021-07-13 19:53:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.3823529411764706) internal successors, (2268), 952 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 19:53:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2268 transitions. [2021-07-13 19:53:36,641 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2268 transitions. Word has length 29 [2021-07-13 19:53:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:36,641 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2268 transitions. [2021-07-13 19:53:36,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2268 transitions. [2021-07-13 19:53:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:36,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:36,642 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:36,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-13 19:53:36,843 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:36,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:36,843 INFO L82 PathProgramCache]: Analyzing trace with hash -406121016, now seen corresponding path program 90 times [2021-07-13 19:53:36,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:36,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459590633] [2021-07-13 19:53:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:37,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:37,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459590633] [2021-07-13 19:53:37,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459590633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:37,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563824401] [2021-07-13 19:53:37,086 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:37,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:53:37,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:37,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:37,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:37,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:37,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:53:37,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:37,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:37,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:37,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:53:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:37,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563824401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:37,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:37,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:53:37,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724404103] [2021-07-13 19:53:37,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:53:37,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:53:37,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:37,289 INFO L87 Difference]: Start difference. First operand 953 states and 2268 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:38,460 INFO L93 Difference]: Finished difference Result 2253 states and 5532 transitions. [2021-07-13 19:53:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:53:38,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:38,463 INFO L225 Difference]: With dead ends: 2253 [2021-07-13 19:53:38,463 INFO L226 Difference]: Without dead ends: 2234 [2021-07-13 19:53:38,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 905.3ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:53:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-07-13 19:53:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 932. [2021-07-13 19:53:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.380236305048335) internal successors, (2216), 931 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 19:53:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2216 transitions. [2021-07-13 19:53:38,485 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2216 transitions. Word has length 29 [2021-07-13 19:53:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:38,485 INFO L482 AbstractCegarLoop]: Abstraction has 932 states and 2216 transitions. [2021-07-13 19:53:38,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2216 transitions. [2021-07-13 19:53:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:38,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:38,486 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:38,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-13 19:53:38,686 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1887372330, now seen corresponding path program 91 times [2021-07-13 19:53:38,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:38,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28878502] [2021-07-13 19:53:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:38,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:38,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28878502] [2021-07-13 19:53:38,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28878502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:38,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751236063] [2021-07-13 19:53:38,920 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:38,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:39,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:53:39,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:39,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:39,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:39,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:53:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:39,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751236063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:39,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:39,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 19:53:39,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131455535] [2021-07-13 19:53:39,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:53:39,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:39,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:53:39,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:53:39,127 INFO L87 Difference]: Start difference. First operand 932 states and 2216 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:53:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:40,490 INFO L93 Difference]: Finished difference Result 2755 states and 6854 transitions. [2021-07-13 19:53:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:53:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:40,494 INFO L225 Difference]: With dead ends: 2755 [2021-07-13 19:53:40,494 INFO L226 Difference]: Without dead ends: 2741 [2021-07-13 19:53:40,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1089.7ms TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:53:40,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-07-13 19:53:40,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 950. [2021-07-13 19:53:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.3825079030558483) internal successors, (2261), 949 states have internal predecessors, (2261), 0 states have call successors, (0), 0 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 19:53:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2261 transitions. [2021-07-13 19:53:40,509 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2261 transitions. Word has length 29 [2021-07-13 19:53:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:40,509 INFO L482 AbstractCegarLoop]: Abstraction has 950 states and 2261 transitions. [2021-07-13 19:53:40,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:53:40,509 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2261 transitions. [2021-07-13 19:53:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:40,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:40,511 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:40,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 19:53:40,713 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:40,713 INFO L82 PathProgramCache]: Analyzing trace with hash -651193916, now seen corresponding path program 92 times [2021-07-13 19:53:40,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:40,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096696375] [2021-07-13 19:53:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:40,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:40,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096696375] [2021-07-13 19:53:40,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096696375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:40,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748241493] [2021-07-13 19:53:40,973 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:41,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:41,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:41,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:41,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:41,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:41,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:41,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:41,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:41,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:41,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748241493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:41,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:41,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 19:53:41,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400264890] [2021-07-13 19:53:41,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:53:41,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:41,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:53:41,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:53:41,207 INFO L87 Difference]: Start difference. First operand 950 states and 2261 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:53:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:42,628 INFO L93 Difference]: Finished difference Result 2470 states and 6122 transitions. [2021-07-13 19:53:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:53:42,628 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:42,632 INFO L225 Difference]: With dead ends: 2470 [2021-07-13 19:53:42,632 INFO L226 Difference]: Without dead ends: 2453 [2021-07-13 19:53:42,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1151.6ms TimeCoverageRelationStatistics Valid=294, Invalid=1188, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:53:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-07-13 19:53:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 934. [2021-07-13 19:53:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 2.382636655948553) internal successors, (2223), 933 states have internal predecessors, (2223), 0 states have call successors, (0), 0 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 19:53:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 2223 transitions. [2021-07-13 19:53:42,647 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 2223 transitions. Word has length 29 [2021-07-13 19:53:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:42,647 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 2223 transitions. [2021-07-13 19:53:42,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:53:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 2223 transitions. [2021-07-13 19:53:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:42,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:42,648 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:42,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-13 19:53:42,849 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash 877760152, now seen corresponding path program 93 times [2021-07-13 19:53:42,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:42,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263557179] [2021-07-13 19:53:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:43,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:43,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263557179] [2021-07-13 19:53:43,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263557179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:43,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338138066] [2021-07-13 19:53:43,081 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:43,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:53:43,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:43,108 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:53:43,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:43,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:43,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-13 19:53:43,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:43,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:43,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:43,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:229 [2021-07-13 19:53:43,576 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-07-13 19:53:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:43,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338138066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:43,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:43,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:53:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747105992] [2021-07-13 19:53:43,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:53:43,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:43,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:53:43,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:53:43,732 INFO L87 Difference]: Start difference. First operand 934 states and 2223 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:46,786 INFO L93 Difference]: Finished difference Result 2299 states and 5624 transitions. [2021-07-13 19:53:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:53:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:46,789 INFO L225 Difference]: With dead ends: 2299 [2021-07-13 19:53:46,789 INFO L226 Difference]: Without dead ends: 2286 [2021-07-13 19:53:46,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 2387.9ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:53:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-07-13 19:53:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 928. [2021-07-13 19:53:46,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 2.3797195253505934) internal successors, (2206), 927 states have internal predecessors, (2206), 0 states have call successors, (0), 0 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 19:53:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2206 transitions. [2021-07-13 19:53:46,803 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2206 transitions. Word has length 29 [2021-07-13 19:53:46,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:46,803 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 2206 transitions. [2021-07-13 19:53:46,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,803 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2206 transitions. [2021-07-13 19:53:46,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:46,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:46,804 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:47,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 19:53:47,004 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:47,005 INFO L82 PathProgramCache]: Analyzing trace with hash 106621528, now seen corresponding path program 94 times [2021-07-13 19:53:47,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:47,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366717852] [2021-07-13 19:53:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:47,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:47,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366717852] [2021-07-13 19:53:47,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366717852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:47,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939400640] [2021-07-13 19:53:47,195 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:47,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:47,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:47,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:47,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:47,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:47,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:47,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:47,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:47,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:53:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:47,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939400640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:47,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:47,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-13 19:53:47,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034161941] [2021-07-13 19:53:47,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:53:47,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:47,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:53:47,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:47,414 INFO L87 Difference]: Start difference. First operand 928 states and 2206 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 19:53:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:48,630 INFO L93 Difference]: Finished difference Result 2297 states and 5621 transitions. [2021-07-13 19:53:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:53:48,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:48,633 INFO L225 Difference]: With dead ends: 2297 [2021-07-13 19:53:48,633 INFO L226 Difference]: Without dead ends: 2287 [2021-07-13 19:53:48,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 896.1ms TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:53:48,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-07-13 19:53:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 916. [2021-07-13 19:53:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.377049180327869) internal successors, (2175), 915 states have internal predecessors, (2175), 0 states have call successors, (0), 0 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 19:53:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 2175 transitions. [2021-07-13 19:53:48,646 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 2175 transitions. Word has length 29 [2021-07-13 19:53:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:48,647 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 2175 transitions. [2021-07-13 19:53:48,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 19:53:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 2175 transitions. [2021-07-13 19:53:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:48,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:48,648 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:48,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-07-13 19:53:48,869 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:48,870 INFO L82 PathProgramCache]: Analyzing trace with hash -795224462, now seen corresponding path program 95 times [2021-07-13 19:53:48,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:48,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098413454] [2021-07-13 19:53:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:49,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:49,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098413454] [2021-07-13 19:53:49,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098413454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:49,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098463189] [2021-07-13 19:53:49,084 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:49,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:53:49,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:49,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:49,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:49,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:49,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:49,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:49,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:53:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:49,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098463189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:49,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:49,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:53:49,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451776206] [2021-07-13 19:53:49,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:53:49,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:49,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:53:49,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:49,323 INFO L87 Difference]: Start difference. First operand 916 states and 2175 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:50,700 INFO L93 Difference]: Finished difference Result 2293 states and 5572 transitions. [2021-07-13 19:53:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:53:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:50,703 INFO L225 Difference]: With dead ends: 2293 [2021-07-13 19:53:50,703 INFO L226 Difference]: Without dead ends: 2276 [2021-07-13 19:53:50,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 972.4ms TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:53:50,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-07-13 19:53:50,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 930. [2021-07-13 19:53:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 2.3810548977395047) internal successors, (2212), 929 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 19:53:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 2212 transitions. [2021-07-13 19:53:50,716 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 2212 transitions. Word has length 29 [2021-07-13 19:53:50,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:50,716 INFO L482 AbstractCegarLoop]: Abstraction has 930 states and 2212 transitions. [2021-07-13 19:53:50,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 2212 transitions. [2021-07-13 19:53:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:50,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:50,717 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:50,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-07-13 19:53:50,918 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash -615707022, now seen corresponding path program 96 times [2021-07-13 19:53:50,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:50,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426657318] [2021-07-13 19:53:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:51,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426657318] [2021-07-13 19:53:51,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426657318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141147332] [2021-07-13 19:53:51,131 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:51,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:53:51,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:51,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:51,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:51,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:53:51,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:51,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:51,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:51,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:53:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:51,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141147332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:51,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:51,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:53:51,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123397056] [2021-07-13 19:53:51,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:53:51,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:51,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:53:51,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:51,359 INFO L87 Difference]: Start difference. First operand 930 states and 2212 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:52,968 INFO L93 Difference]: Finished difference Result 2752 states and 6767 transitions. [2021-07-13 19:53:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:53:52,969 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:52,972 INFO L225 Difference]: With dead ends: 2752 [2021-07-13 19:53:52,972 INFO L226 Difference]: Without dead ends: 2735 [2021-07-13 19:53:52,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1391.7ms TimeCoverageRelationStatistics Valid=470, Invalid=1882, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:53:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-07-13 19:53:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 941. [2021-07-13 19:53:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 2.3861702127659576) internal successors, (2243), 940 states have internal predecessors, (2243), 0 states have call successors, (0), 0 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 19:53:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2243 transitions. [2021-07-13 19:53:52,987 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2243 transitions. Word has length 29 [2021-07-13 19:53:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:52,987 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 2243 transitions. [2021-07-13 19:53:52,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2243 transitions. [2021-07-13 19:53:52,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:52,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:52,988 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:53,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:53,188 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:53,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:53,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1084535256, now seen corresponding path program 97 times [2021-07-13 19:53:53,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:53,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484710549] [2021-07-13 19:53:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:53,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484710549] [2021-07-13 19:53:53,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484710549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039122930] [2021-07-13 19:53:53,398 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:53,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:53,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:53,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:53,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 19:53:53,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:53,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:53,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:53,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:53:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:53,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039122930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:53,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:53,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 19:53:53,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221290468] [2021-07-13 19:53:53,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:53:53,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:53,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:53:53,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:53,608 INFO L87 Difference]: Start difference. First operand 941 states and 2243 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:54,607 INFO L93 Difference]: Finished difference Result 2369 states and 5826 transitions. [2021-07-13 19:53:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:53:54,607 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:54,610 INFO L225 Difference]: With dead ends: 2369 [2021-07-13 19:53:54,610 INFO L226 Difference]: Without dead ends: 2351 [2021-07-13 19:53:54,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 872.4ms TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:53:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-07-13 19:53:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 908. [2021-07-13 19:53:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 2.377067254685777) internal successors, (2156), 907 states have internal predecessors, (2156), 0 states have call successors, (0), 0 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 19:53:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2156 transitions. [2021-07-13 19:53:54,623 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2156 transitions. Word has length 29 [2021-07-13 19:53:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:54,623 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 2156 transitions. [2021-07-13 19:53:54,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2156 transitions. [2021-07-13 19:53:54,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:54,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:54,624 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:54,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-07-13 19:53:54,825 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:54,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:54,825 INFO L82 PathProgramCache]: Analyzing trace with hash -608198470, now seen corresponding path program 98 times [2021-07-13 19:53:54,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:54,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868550820] [2021-07-13 19:53:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:55,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:55,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868550820] [2021-07-13 19:53:55,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868550820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:55,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82886597] [2021-07-13 19:53:55,035 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:55,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:55,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:55,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:55,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:55,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:53:55,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 19:53:55,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:55,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:55,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:55,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-07-13 19:53:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:55,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82886597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:55,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:55,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-13 19:53:55,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238690487] [2021-07-13 19:53:55,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:53:55,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:53:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:55,290 INFO L87 Difference]: Start difference. First operand 908 states and 2156 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:56,111 INFO L93 Difference]: Finished difference Result 2096 states and 5106 transitions. [2021-07-13 19:53:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:53:56,111 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:56,114 INFO L225 Difference]: With dead ends: 2096 [2021-07-13 19:53:56,114 INFO L226 Difference]: Without dead ends: 2087 [2021-07-13 19:53:56,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 672.9ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:53:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-07-13 19:53:56,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 901. [2021-07-13 19:53:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.3777777777777778) internal successors, (2140), 900 states have internal predecessors, (2140), 0 states have call successors, (0), 0 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 19:53:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 2140 transitions. [2021-07-13 19:53:56,130 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 2140 transitions. Word has length 29 [2021-07-13 19:53:56,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:56,131 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 2140 transitions. [2021-07-13 19:53:56,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 2140 transitions. [2021-07-13 19:53:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:53:56,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:56,132 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] [2021-07-13 19:53:56,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:56,355 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:56,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:56,355 INFO L82 PathProgramCache]: Analyzing trace with hash -154214669, now seen corresponding path program 1 times [2021-07-13 19:53:56,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:56,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629702459] [2021-07-13 19:53:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:56,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:56,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629702459] [2021-07-13 19:53:56,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629702459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:56,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300617822] [2021-07-13 19:53:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:56,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:53:56,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:56,798 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:53:56,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-07-13 19:53:56,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:56,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:56,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:56,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-07-13 19:53:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:56,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300617822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:56,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:56,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:53:56,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809554132] [2021-07-13 19:53:56,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:53:56,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:56,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:53:56,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:56,824 INFO L87 Difference]: Start difference. First operand 901 states and 2140 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:57,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:57,897 INFO L93 Difference]: Finished difference Result 2216 states and 5379 transitions. [2021-07-13 19:53:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:57,897 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:53:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:57,900 INFO L225 Difference]: With dead ends: 2216 [2021-07-13 19:53:57,900 INFO L226 Difference]: Without dead ends: 2206 [2021-07-13 19:53:57,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 678.5ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:53:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2021-07-13 19:53:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 904. [2021-07-13 19:53:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.3754152823920265) internal successors, (2145), 903 states have internal predecessors, (2145), 0 states have call successors, (0), 0 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 19:53:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2145 transitions. [2021-07-13 19:53:57,913 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2145 transitions. Word has length 30 [2021-07-13 19:53:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:57,913 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2145 transitions. [2021-07-13 19:53:57,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:53:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2145 transitions. [2021-07-13 19:53:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:53:57,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:57,914 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] [2021-07-13 19:53:58,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:58,116 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash 351841351, now seen corresponding path program 2 times [2021-07-13 19:53:58,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:58,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654276602] [2021-07-13 19:53:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:58,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:58,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654276602] [2021-07-13 19:53:58,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654276602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:58,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279486824] [2021-07-13 19:53:58,342 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:58,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:58,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:58,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:53:58,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:58,523 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:53:58,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-07-13 19:53:58,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:58,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:58,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:58,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-07-13 19:53:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:58,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279486824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:58,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:58,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:53:58,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903041087] [2021-07-13 19:53:58,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:53:58,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:53:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:58,557 INFO L87 Difference]: Start difference. First operand 904 states and 2145 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:53:59,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:59,774 INFO L93 Difference]: Finished difference Result 2488 states and 6084 transitions. [2021-07-13 19:53:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:53:59,774 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:53:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:59,777 INFO L225 Difference]: With dead ends: 2488 [2021-07-13 19:53:59,777 INFO L226 Difference]: Without dead ends: 2477 [2021-07-13 19:53:59,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 884.6ms TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:53:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-07-13 19:53:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 943. [2021-07-13 19:53:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.3842887473460723) internal successors, (2246), 942 states have internal predecessors, (2246), 0 states have call successors, (0), 0 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 19:53:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2246 transitions. [2021-07-13 19:53:59,791 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2246 transitions. Word has length 30 [2021-07-13 19:53:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:59,791 INFO L482 AbstractCegarLoop]: Abstraction has 943 states and 2246 transitions. [2021-07-13 19:53:59,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:53:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2246 transitions. [2021-07-13 19:53:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:53:59,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:59,792 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] [2021-07-13 19:53:59,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:59,993 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2108242401, now seen corresponding path program 3 times [2021-07-13 19:53:59,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:59,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163907526] [2021-07-13 19:53:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:00,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:00,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163907526] [2021-07-13 19:54:00,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163907526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:00,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469351382] [2021-07-13 19:54:00,238 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:00,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:00,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:00,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:00,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:00,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:00,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:54:00,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:00,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:00,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:00,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-07-13 19:54:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:00,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469351382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:00,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:00,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-13 19:54:00,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64159013] [2021-07-13 19:54:00,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:54:00,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:00,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:54:00,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:54:00,766 INFO L87 Difference]: Start difference. First operand 943 states and 2246 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:02,483 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-07-13 19:54:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:02,963 INFO L93 Difference]: Finished difference Result 2409 states and 5926 transitions. [2021-07-13 19:54:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:54:02,963 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:02,966 INFO L225 Difference]: With dead ends: 2409 [2021-07-13 19:54:02,966 INFO L226 Difference]: Without dead ends: 2396 [2021-07-13 19:54:02,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1883.7ms TimeCoverageRelationStatistics Valid=486, Invalid=2270, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:54:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-07-13 19:54:02,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 939. [2021-07-13 19:54:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.38272921108742) internal successors, (2235), 938 states have internal predecessors, (2235), 0 states have call successors, (0), 0 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 19:54:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2235 transitions. [2021-07-13 19:54:02,979 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2235 transitions. Word has length 30 [2021-07-13 19:54:02,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:02,979 INFO L482 AbstractCegarLoop]: Abstraction has 939 states and 2235 transitions. [2021-07-13 19:54:02,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2235 transitions. [2021-07-13 19:54:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:02,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:02,980 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] [2021-07-13 19:54:03,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-13 19:54:03,181 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:03,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:03,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1190292211, now seen corresponding path program 4 times [2021-07-13 19:54:03,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:03,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096647394] [2021-07-13 19:54:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:03,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:03,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096647394] [2021-07-13 19:54:03,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096647394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:03,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509447339] [2021-07-13 19:54:03,443 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:03,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:03,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:03,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:03,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:54:03,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:03,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:03,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:03,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-07-13 19:54:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:03,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509447339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:03,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:03,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:03,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813700994] [2021-07-13 19:54:03,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:03,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:03,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:03,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:03,656 INFO L87 Difference]: Start difference. First operand 939 states and 2235 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:05,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:05,215 INFO L93 Difference]: Finished difference Result 2854 states and 6989 transitions. [2021-07-13 19:54:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:54:05,215 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:05,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:05,218 INFO L225 Difference]: With dead ends: 2854 [2021-07-13 19:54:05,218 INFO L226 Difference]: Without dead ends: 2836 [2021-07-13 19:54:05,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1200.7ms TimeCoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:54:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2021-07-13 19:54:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 927. [2021-07-13 19:54:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 2.379049676025918) internal successors, (2203), 926 states have internal predecessors, (2203), 0 states have call successors, (0), 0 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 19:54:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2203 transitions. [2021-07-13 19:54:05,233 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2203 transitions. Word has length 30 [2021-07-13 19:54:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:05,233 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 2203 transitions. [2021-07-13 19:54:05,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2203 transitions. [2021-07-13 19:54:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:05,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:05,234 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] [2021-07-13 19:54:05,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:05,435 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:05,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1651280687, now seen corresponding path program 5 times [2021-07-13 19:54:05,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:05,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646512683] [2021-07-13 19:54:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:05,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:05,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646512683] [2021-07-13 19:54:05,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646512683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:05,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276804206] [2021-07-13 19:54:05,662 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:05,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:05,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:05,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:05,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:05,868 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:54:05,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-07-13 19:54:05,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:05,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:05,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:05,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-07-13 19:54:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:05,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276804206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:05,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:05,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:05,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419993744] [2021-07-13 19:54:05,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:05,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:05,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:05,895 INFO L87 Difference]: Start difference. First operand 927 states and 2203 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:07,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:07,031 INFO L93 Difference]: Finished difference Result 2280 states and 5518 transitions. [2021-07-13 19:54:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:54:07,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:07,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:07,034 INFO L225 Difference]: With dead ends: 2280 [2021-07-13 19:54:07,034 INFO L226 Difference]: Without dead ends: 2260 [2021-07-13 19:54:07,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 797.4ms TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:54:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-07-13 19:54:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 925. [2021-07-13 19:54:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.378787878787879) internal successors, (2198), 924 states have internal predecessors, (2198), 0 states have call successors, (0), 0 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 19:54:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2198 transitions. [2021-07-13 19:54:07,047 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2198 transitions. Word has length 30 [2021-07-13 19:54:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:07,047 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2198 transitions. [2021-07-13 19:54:07,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2198 transitions. [2021-07-13 19:54:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:07,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:07,048 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] [2021-07-13 19:54:07,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:07,249 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:07,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:07,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1006114153, now seen corresponding path program 6 times [2021-07-13 19:54:07,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:07,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810574499] [2021-07-13 19:54:07,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:07,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810574499] [2021-07-13 19:54:07,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810574499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25475655] [2021-07-13 19:54:07,482 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:07,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:07,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:07,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:07,697 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:54:07,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-07-13 19:54:07,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:07,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:07,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:07,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-07-13 19:54:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:07,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25475655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:07,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:07,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:07,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628010367] [2021-07-13 19:54:07,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:07,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:07,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:07,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:07,724 INFO L87 Difference]: Start difference. First operand 925 states and 2198 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:08,871 INFO L93 Difference]: Finished difference Result 2372 states and 5731 transitions. [2021-07-13 19:54:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:54:08,871 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:08,874 INFO L225 Difference]: With dead ends: 2372 [2021-07-13 19:54:08,874 INFO L226 Difference]: Without dead ends: 2335 [2021-07-13 19:54:08,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 844.6ms TimeCoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:54:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-13 19:54:08,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 919. [2021-07-13 19:54:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.377995642701525) internal successors, (2183), 918 states have internal predecessors, (2183), 0 states have call successors, (0), 0 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 19:54:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2183 transitions. [2021-07-13 19:54:08,887 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2183 transitions. Word has length 30 [2021-07-13 19:54:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:08,887 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2183 transitions. [2021-07-13 19:54:08,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2183 transitions. [2021-07-13 19:54:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:08,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:08,888 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] [2021-07-13 19:54:09,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:09,089 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash -627290201, now seen corresponding path program 7 times [2021-07-13 19:54:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:09,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440627532] [2021-07-13 19:54:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:09,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:09,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440627532] [2021-07-13 19:54:09,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440627532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:09,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404830453] [2021-07-13 19:54:09,343 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:09,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:09,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:09,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:54:09,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:09,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:09,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:09,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-07-13 19:54:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:09,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404830453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:09,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:09,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:09,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870260799] [2021-07-13 19:54:09,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:09,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:09,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:09,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:09,554 INFO L87 Difference]: Start difference. First operand 919 states and 2183 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:10,489 INFO L93 Difference]: Finished difference Result 2181 states and 5300 transitions. [2021-07-13 19:54:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:54:10,489 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:10,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:10,492 INFO L225 Difference]: With dead ends: 2181 [2021-07-13 19:54:10,492 INFO L226 Difference]: Without dead ends: 2171 [2021-07-13 19:54:10,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:54:10,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-07-13 19:54:10,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 919. [2021-07-13 19:54:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.377995642701525) internal successors, (2183), 918 states have internal predecessors, (2183), 0 states have call successors, (0), 0 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 19:54:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2183 transitions. [2021-07-13 19:54:10,505 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2183 transitions. Word has length 30 [2021-07-13 19:54:10,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:10,505 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2183 transitions. [2021-07-13 19:54:10,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2183 transitions. [2021-07-13 19:54:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:10,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:10,506 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] [2021-07-13 19:54:10,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-07-13 19:54:10,707 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:10,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1787800249, now seen corresponding path program 8 times [2021-07-13 19:54:10,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:10,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632548888] [2021-07-13 19:54:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:10,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:10,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632548888] [2021-07-13 19:54:10,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632548888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:10,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122630842] [2021-07-13 19:54:10,978 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:11,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:11,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:11,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:11,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:11,183 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:54:11,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 51 [2021-07-13 19:54:11,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:11,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:11,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:11,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:93, output treesize:10 [2021-07-13 19:54:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:11,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122630842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:11,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:11,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-07-13 19:54:11,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326074866] [2021-07-13 19:54:11,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:54:11,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:11,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:54:11,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:54:11,210 INFO L87 Difference]: Start difference. First operand 919 states and 2183 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:54:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:12,763 INFO L93 Difference]: Finished difference Result 2227 states and 5452 transitions. [2021-07-13 19:54:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:54:12,764 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:54:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:12,767 INFO L225 Difference]: With dead ends: 2227 [2021-07-13 19:54:12,767 INFO L226 Difference]: Without dead ends: 2218 [2021-07-13 19:54:12,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1090.7ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:54:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-07-13 19:54:12,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 943. [2021-07-13 19:54:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.3832271762208066) internal successors, (2245), 942 states have internal predecessors, (2245), 0 states have call successors, (0), 0 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 19:54:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2245 transitions. [2021-07-13 19:54:12,780 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2245 transitions. Word has length 30 [2021-07-13 19:54:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:12,780 INFO L482 AbstractCegarLoop]: Abstraction has 943 states and 2245 transitions. [2021-07-13 19:54:12,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:54:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2245 transitions. [2021-07-13 19:54:12,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:12,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:12,781 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] [2021-07-13 19:54:12,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:12,994 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:12,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1608282809, now seen corresponding path program 9 times [2021-07-13 19:54:12,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:12,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566769034] [2021-07-13 19:54:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:13,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:13,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566769034] [2021-07-13 19:54:13,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566769034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:13,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607545831] [2021-07-13 19:54:13,251 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:13,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:54:13,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:13,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:13,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:13,447 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:54:13,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-07-13 19:54:13,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:13,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:13,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:13,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-07-13 19:54:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:13,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607545831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:13,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:13,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:54:13,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761114856] [2021-07-13 19:54:13,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:54:13,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:13,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:54:13,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:54:13,476 INFO L87 Difference]: Start difference. First operand 943 states and 2245 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 19:54:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:14,812 INFO L93 Difference]: Finished difference Result 2256 states and 5532 transitions. [2021-07-13 19:54:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:54:14,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 30 [2021-07-13 19:54:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:14,815 INFO L225 Difference]: With dead ends: 2256 [2021-07-13 19:54:14,815 INFO L226 Difference]: Without dead ends: 2245 [2021-07-13 19:54:14,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1087.4ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:54:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2021-07-13 19:54:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 955. [2021-07-13 19:54:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 2.3846960167714886) internal successors, (2275), 954 states have internal predecessors, (2275), 0 states have call successors, (0), 0 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 19:54:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 2275 transitions. [2021-07-13 19:54:14,836 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 2275 transitions. Word has length 30 [2021-07-13 19:54:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:14,836 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 2275 transitions. [2021-07-13 19:54:14,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 19:54:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 2275 transitions. [2021-07-13 19:54:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:14,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:14,837 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] [2021-07-13 19:54:15,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-13 19:54:15,038 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:15,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1743084217, now seen corresponding path program 10 times [2021-07-13 19:54:15,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:15,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717754337] [2021-07-13 19:54:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:15,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:15,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717754337] [2021-07-13 19:54:15,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717754337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:15,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339888243] [2021-07-13 19:54:15,310 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:15,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:15,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:15,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:15,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:15,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:54:15,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:15,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:15,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:15,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-07-13 19:54:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:15,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339888243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:15,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:15,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:54:15,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032395505] [2021-07-13 19:54:15,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:54:15,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:15,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:54:15,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:54:15,519 INFO L87 Difference]: Start difference. First operand 955 states and 2275 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 19:54:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:16,857 INFO L93 Difference]: Finished difference Result 2341 states and 5751 transitions. [2021-07-13 19:54:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:54:16,857 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 30 [2021-07-13 19:54:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:16,860 INFO L225 Difference]: With dead ends: 2341 [2021-07-13 19:54:16,860 INFO L226 Difference]: Without dead ends: 2321 [2021-07-13 19:54:16,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1149.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:54:16,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2021-07-13 19:54:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 934. [2021-07-13 19:54:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 2.380493033226152) internal successors, (2221), 933 states have internal predecessors, (2221), 0 states have call successors, (0), 0 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 19:54:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 2221 transitions. [2021-07-13 19:54:16,874 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 2221 transitions. Word has length 30 [2021-07-13 19:54:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:16,874 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 2221 transitions. [2021-07-13 19:54:16,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 19:54:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 2221 transitions. [2021-07-13 19:54:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:16,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:16,875 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] [2021-07-13 19:54:17,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-13 19:54:17,076 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:17,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1320754679, now seen corresponding path program 11 times [2021-07-13 19:54:17,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:17,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055358821] [2021-07-13 19:54:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:17,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055358821] [2021-07-13 19:54:17,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055358821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976017780] [2021-07-13 19:54:17,349 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:17,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:17,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:17,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:17,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:17,537 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:54:17,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-07-13 19:54:17,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:17,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:17,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:17,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-07-13 19:54:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:17,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976017780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:17,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:17,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:54:17,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732828870] [2021-07-13 19:54:17,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:54:17,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:17,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:54:17,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:54:17,569 INFO L87 Difference]: Start difference. First operand 934 states and 2221 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:54:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:19,066 INFO L93 Difference]: Finished difference Result 2334 states and 5711 transitions. [2021-07-13 19:54:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:54:19,067 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:54:19,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:19,069 INFO L225 Difference]: With dead ends: 2334 [2021-07-13 19:54:19,069 INFO L226 Difference]: Without dead ends: 2323 [2021-07-13 19:54:19,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1165.2ms TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:54:19,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-07-13 19:54:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 949. [2021-07-13 19:54:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 2.3818565400843883) internal successors, (2258), 948 states have internal predecessors, (2258), 0 states have call successors, (0), 0 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 19:54:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2258 transitions. [2021-07-13 19:54:19,082 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2258 transitions. Word has length 30 [2021-07-13 19:54:19,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:19,082 INFO L482 AbstractCegarLoop]: Abstraction has 949 states and 2258 transitions. [2021-07-13 19:54:19,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:54:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2258 transitions. [2021-07-13 19:54:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:19,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:19,084 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] [2021-07-13 19:54:19,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-07-13 19:54:19,284 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:19,284 INFO L82 PathProgramCache]: Analyzing trace with hash 435646371, now seen corresponding path program 12 times [2021-07-13 19:54:19,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:19,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564557912] [2021-07-13 19:54:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:19,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:19,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564557912] [2021-07-13 19:54:19,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564557912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:19,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641148380] [2021-07-13 19:54:19,573 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:19,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:19,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:19,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:54:19,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:19,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:19,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 19:54:19,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:19,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:19,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:19,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-07-13 19:54:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:19,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641148380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:19,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:19,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:54:19,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178434568] [2021-07-13 19:54:19,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:54:19,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:19,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:54:19,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:54:19,894 INFO L87 Difference]: Start difference. First operand 949 states and 2258 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:54:21,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:21,965 INFO L93 Difference]: Finished difference Result 2492 states and 6124 transitions. [2021-07-13 19:54:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:54:21,966 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 30 [2021-07-13 19:54:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:21,969 INFO L225 Difference]: With dead ends: 2492 [2021-07-13 19:54:21,969 INFO L226 Difference]: Without dead ends: 2480 [2021-07-13 19:54:21,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1724.2ms TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:54:21,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-07-13 19:54:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 970. [2021-07-13 19:54:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 2.3859649122807016) internal successors, (2312), 969 states have internal predecessors, (2312), 0 states have call successors, (0), 0 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 19:54:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 2312 transitions. [2021-07-13 19:54:21,983 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 2312 transitions. Word has length 30 [2021-07-13 19:54:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:21,983 INFO L482 AbstractCegarLoop]: Abstraction has 970 states and 2312 transitions. [2021-07-13 19:54:21,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:54:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 2312 transitions. [2021-07-13 19:54:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:21,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:21,984 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] [2021-07-13 19:54:22,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:22,185 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:22,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:22,185 INFO L82 PathProgramCache]: Analyzing trace with hash -482303819, now seen corresponding path program 13 times [2021-07-13 19:54:22,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:22,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585867363] [2021-07-13 19:54:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:22,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:22,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585867363] [2021-07-13 19:54:22,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585867363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:22,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658399177] [2021-07-13 19:54:22,480 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:22,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:22,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:22,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:54:22,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:22,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:22,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:22,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-07-13 19:54:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:22,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658399177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:22,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:22,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:22,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497096398] [2021-07-13 19:54:22,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:22,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:22,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:22,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:22,690 INFO L87 Difference]: Start difference. First operand 970 states and 2312 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:24,972 INFO L93 Difference]: Finished difference Result 2813 states and 6856 transitions. [2021-07-13 19:54:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 19:54:24,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:24,976 INFO L225 Difference]: With dead ends: 2813 [2021-07-13 19:54:24,976 INFO L226 Difference]: Without dead ends: 2791 [2021-07-13 19:54:24,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1855.0ms TimeCoverageRelationStatistics Valid=680, Invalid=3226, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 19:54:24,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-07-13 19:54:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 937. [2021-07-13 19:54:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 2.3792735042735043) internal successors, (2227), 936 states have internal predecessors, (2227), 0 states have call successors, (0), 0 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 19:54:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2227 transitions. [2021-07-13 19:54:24,991 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2227 transitions. Word has length 30 [2021-07-13 19:54:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:24,991 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 2227 transitions. [2021-07-13 19:54:24,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2227 transitions. [2021-07-13 19:54:24,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:24,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:24,992 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] [2021-07-13 19:54:25,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-07-13 19:54:25,214 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:25,214 INFO L82 PathProgramCache]: Analyzing trace with hash 971090579, now seen corresponding path program 14 times [2021-07-13 19:54:25,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:25,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337208999] [2021-07-13 19:54:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:25,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:25,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337208999] [2021-07-13 19:54:25,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337208999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:25,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185162274] [2021-07-13 19:54:25,490 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:25,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:25,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:25,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:54:25,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:25,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:25,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 19:54:25,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:25,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:25,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:25,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-07-13 19:54:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:25,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185162274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:25,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:25,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-13 19:54:25,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689451305] [2021-07-13 19:54:25,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:54:25,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:25,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:54:25,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:54:25,837 INFO L87 Difference]: Start difference. First operand 937 states and 2227 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:28,350 INFO L93 Difference]: Finished difference Result 2461 states and 5969 transitions. [2021-07-13 19:54:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:54:28,351 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:28,354 INFO L225 Difference]: With dead ends: 2461 [2021-07-13 19:54:28,354 INFO L226 Difference]: Without dead ends: 2441 [2021-07-13 19:54:28,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2005.5ms TimeCoverageRelationStatistics Valid=672, Invalid=2988, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:54:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-07-13 19:54:28,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 947. [2021-07-13 19:54:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 2.382663847780127) internal successors, (2254), 946 states have internal predecessors, (2254), 0 states have call successors, (0), 0 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 19:54:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 2254 transitions. [2021-07-13 19:54:28,367 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 2254 transitions. Word has length 30 [2021-07-13 19:54:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:28,367 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 2254 transitions. [2021-07-13 19:54:28,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 2254 transitions. [2021-07-13 19:54:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:28,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:28,368 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] [2021-07-13 19:54:28,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:28,573 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:28,573 INFO L82 PathProgramCache]: Analyzing trace with hash -292888029, now seen corresponding path program 15 times [2021-07-13 19:54:28,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:28,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325108870] [2021-07-13 19:54:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:28,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:28,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325108870] [2021-07-13 19:54:28,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325108870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:28,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960005502] [2021-07-13 19:54:28,835 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:28,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:28,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:28,859 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:28,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:29,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:29,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:54:29,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:29,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:29,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:29,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-07-13 19:54:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:29,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960005502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:29,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:29,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-13 19:54:29,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820428143] [2021-07-13 19:54:29,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:54:29,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:29,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:54:29,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:54:29,317 INFO L87 Difference]: Start difference. First operand 947 states and 2254 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:29,870 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-07-13 19:54:30,163 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-13 19:54:30,777 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-13 19:54:31,131 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-07-13 19:54:32,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:32,286 INFO L93 Difference]: Finished difference Result 2339 states and 5693 transitions. [2021-07-13 19:54:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:54:32,286 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:32,289 INFO L225 Difference]: With dead ends: 2339 [2021-07-13 19:54:32,289 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 19:54:32,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 2582.4ms TimeCoverageRelationStatistics Valid=562, Invalid=3098, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:54:32,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 19:54:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 971. [2021-07-13 19:54:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.3855670103092783) internal successors, (2314), 970 states have internal predecessors, (2314), 0 states have call successors, (0), 0 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 19:54:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2314 transitions. [2021-07-13 19:54:32,302 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2314 transitions. Word has length 30 [2021-07-13 19:54:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:32,302 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 2314 transitions. [2021-07-13 19:54:32,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2314 transitions. [2021-07-13 19:54:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:32,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:32,303 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] [2021-07-13 19:54:32,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:32,504 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:32,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1463513021, now seen corresponding path program 16 times [2021-07-13 19:54:32,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:32,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763044858] [2021-07-13 19:54:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:32,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:32,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763044858] [2021-07-13 19:54:32,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763044858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:32,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572843893] [2021-07-13 19:54:32,762 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:32,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:32,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:32,785 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:32,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:32,953 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:54:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-07-13 19:54:32,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:32,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:32,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:32,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-07-13 19:54:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:32,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572843893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:32,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:32,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:54:32,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15177961] [2021-07-13 19:54:32,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:54:32,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:32,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:54:32,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:54:32,984 INFO L87 Difference]: Start difference. First operand 971 states and 2314 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:54:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:34,655 INFO L93 Difference]: Finished difference Result 2622 states and 6449 transitions. [2021-07-13 19:54:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:54:34,655 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:54:34,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:34,658 INFO L225 Difference]: With dead ends: 2622 [2021-07-13 19:54:34,658 INFO L226 Difference]: Without dead ends: 2602 [2021-07-13 19:54:34,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1303.3ms TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:54:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-07-13 19:54:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 980. [2021-07-13 19:54:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.3861082737487234) internal successors, (2336), 979 states have internal predecessors, (2336), 0 states have call successors, (0), 0 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 19:54:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2336 transitions. [2021-07-13 19:54:34,673 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2336 transitions. Word has length 30 [2021-07-13 19:54:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:34,673 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 2336 transitions. [2021-07-13 19:54:34,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:54:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2336 transitions. [2021-07-13 19:54:34,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:34,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:34,674 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] [2021-07-13 19:54:34,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-13 19:54:34,874 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:34,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:34,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1998957229, now seen corresponding path program 17 times [2021-07-13 19:54:34,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:34,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185978166] [2021-07-13 19:54:34,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:35,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:35,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185978166] [2021-07-13 19:54:35,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185978166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:35,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035218783] [2021-07-13 19:54:35,135 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:35,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:35,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:35,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:35,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:35,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:54:35,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:35,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:35,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:35,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-07-13 19:54:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:35,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035218783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:35,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:35,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:35,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061081010] [2021-07-13 19:54:35,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:35,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:35,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:35,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:35,347 INFO L87 Difference]: Start difference. First operand 980 states and 2336 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:37,013 INFO L93 Difference]: Finished difference Result 2208 states and 5368 transitions. [2021-07-13 19:54:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:54:37,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:37,016 INFO L225 Difference]: With dead ends: 2208 [2021-07-13 19:54:37,016 INFO L226 Difference]: Without dead ends: 2188 [2021-07-13 19:54:37,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1243.1ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:54:37,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-07-13 19:54:37,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 980. [2021-07-13 19:54:37,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.3840653728294177) internal successors, (2334), 979 states have internal predecessors, (2334), 0 states have call successors, (0), 0 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 19:54:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2334 transitions. [2021-07-13 19:54:37,029 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2334 transitions. Word has length 30 [2021-07-13 19:54:37,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:37,029 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 2334 transitions. [2021-07-13 19:54:37,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:37,029 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2334 transitions. [2021-07-13 19:54:37,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:37,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:37,030 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] [2021-07-13 19:54:37,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:37,230 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:37,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:37,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1891263929, now seen corresponding path program 18 times [2021-07-13 19:54:37,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:37,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002930080] [2021-07-13 19:54:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:37,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:37,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002930080] [2021-07-13 19:54:37,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002930080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:37,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576326495] [2021-07-13 19:54:37,495 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:37,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:37,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:37,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:37,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:37,696 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:54:37,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-07-13 19:54:37,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:37,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:37,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:37,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-07-13 19:54:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:37,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576326495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:37,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:37,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:37,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772457735] [2021-07-13 19:54:37,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:37,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:37,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:37,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:37,725 INFO L87 Difference]: Start difference. First operand 980 states and 2334 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:39,469 INFO L93 Difference]: Finished difference Result 2256 states and 5482 transitions. [2021-07-13 19:54:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:54:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:39,472 INFO L225 Difference]: With dead ends: 2256 [2021-07-13 19:54:39,473 INFO L226 Difference]: Without dead ends: 2219 [2021-07-13 19:54:39,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1273.2ms TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:54:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-07-13 19:54:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 971. [2021-07-13 19:54:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.3804123711340206) internal successors, (2309), 970 states have internal predecessors, (2309), 0 states have call successors, (0), 0 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 19:54:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2309 transitions. [2021-07-13 19:54:39,485 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2309 transitions. Word has length 30 [2021-07-13 19:54:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:39,485 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 2309 transitions. [2021-07-13 19:54:39,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2309 transitions. [2021-07-13 19:54:39,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:39,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:39,486 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] [2021-07-13 19:54:39,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-07-13 19:54:39,687 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:39,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1162356301, now seen corresponding path program 19 times [2021-07-13 19:54:39,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:39,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067128517] [2021-07-13 19:54:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:39,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:39,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067128517] [2021-07-13 19:54:39,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067128517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:39,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672785025] [2021-07-13 19:54:39,907 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:39,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:39,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:40,124 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:54:40,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-07-13 19:54:40,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:40,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:40,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:40,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-07-13 19:54:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:40,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672785025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:40,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:40,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:54:40,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15437426] [2021-07-13 19:54:40,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:54:40,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:40,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:54:40,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:54:40,159 INFO L87 Difference]: Start difference. First operand 971 states and 2309 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:54:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:41,225 INFO L93 Difference]: Finished difference Result 2540 states and 6224 transitions. [2021-07-13 19:54:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:54:41,225 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:54:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:41,228 INFO L225 Difference]: With dead ends: 2540 [2021-07-13 19:54:41,228 INFO L226 Difference]: Without dead ends: 2529 [2021-07-13 19:54:41,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 857.4ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:54:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-07-13 19:54:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1010. [2021-07-13 19:54:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 2.3885034687809714) internal successors, (2410), 1009 states have internal predecessors, (2410), 0 states have call successors, (0), 0 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 19:54:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 2410 transitions. [2021-07-13 19:54:41,243 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 2410 transitions. Word has length 30 [2021-07-13 19:54:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:41,248 INFO L482 AbstractCegarLoop]: Abstraction has 1010 states and 2410 transitions. [2021-07-13 19:54:41,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:54:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 2410 transitions. [2021-07-13 19:54:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:41,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:41,250 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] [2021-07-13 19:54:41,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:41,472 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:41,473 INFO L82 PathProgramCache]: Analyzing trace with hash 594044749, now seen corresponding path program 20 times [2021-07-13 19:54:41,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:41,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124912964] [2021-07-13 19:54:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:41,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:41,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124912964] [2021-07-13 19:54:41,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124912964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:41,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222505740] [2021-07-13 19:54:41,700 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:41,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:41,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:41,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:54:41,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:41,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:41,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 19:54:41,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:41,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:41,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:41,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-07-13 19:54:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:42,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222505740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:42,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:42,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:54:42,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58448655] [2021-07-13 19:54:42,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:54:42,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:42,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:54:42,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:54:42,036 INFO L87 Difference]: Start difference. First operand 1010 states and 2410 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:54:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:43,482 INFO L93 Difference]: Finished difference Result 2582 states and 6364 transitions. [2021-07-13 19:54:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:54:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 30 [2021-07-13 19:54:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:43,486 INFO L225 Difference]: With dead ends: 2582 [2021-07-13 19:54:43,486 INFO L226 Difference]: Without dead ends: 2570 [2021-07-13 19:54:43,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1147.3ms TimeCoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:54:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-07-13 19:54:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1045. [2021-07-13 19:54:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.3946360153256707) internal successors, (2500), 1044 states have internal predecessors, (2500), 0 states have call successors, (0), 0 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 19:54:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2500 transitions. [2021-07-13 19:54:43,507 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2500 transitions. Word has length 30 [2021-07-13 19:54:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:43,507 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2500 transitions. [2021-07-13 19:54:43,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:54:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2500 transitions. [2021-07-13 19:54:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:43,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:43,508 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] [2021-07-13 19:54:43,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:43,709 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:43,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:43,709 INFO L82 PathProgramCache]: Analyzing trace with hash -323905441, now seen corresponding path program 21 times [2021-07-13 19:54:43,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:43,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730140186] [2021-07-13 19:54:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:43,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:43,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730140186] [2021-07-13 19:54:43,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730140186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:43,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469083306] [2021-07-13 19:54:43,937 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:43,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:43,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:43,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:43,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:44,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:54:44,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:44,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:44,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:44,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-07-13 19:54:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:44,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469083306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:44,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:44,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:44,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905927207] [2021-07-13 19:54:44,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:44,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:44,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:44,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:44,144 INFO L87 Difference]: Start difference. First operand 1045 states and 2500 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:45,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:45,577 INFO L93 Difference]: Finished difference Result 2927 states and 7176 transitions. [2021-07-13 19:54:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:54:45,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:45,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:45,581 INFO L225 Difference]: With dead ends: 2927 [2021-07-13 19:54:45,581 INFO L226 Difference]: Without dead ends: 2905 [2021-07-13 19:54:45,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1143.7ms TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:54:45,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-07-13 19:54:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 991. [2021-07-13 19:54:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.3848484848484848) internal successors, (2361), 990 states have internal predecessors, (2361), 0 states have call successors, (0), 0 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 19:54:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2361 transitions. [2021-07-13 19:54:45,597 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2361 transitions. Word has length 30 [2021-07-13 19:54:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:45,597 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 2361 transitions. [2021-07-13 19:54:45,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2361 transitions. [2021-07-13 19:54:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:45,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:45,598 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] [2021-07-13 19:54:45,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-07-13 19:54:45,798 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:45,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:45,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1129488957, now seen corresponding path program 22 times [2021-07-13 19:54:45,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:45,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263294899] [2021-07-13 19:54:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:46,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:46,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263294899] [2021-07-13 19:54:46,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263294899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:46,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329397877] [2021-07-13 19:54:46,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:46,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:46,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:46,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:46,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:46,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:54:46,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:46,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:46,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:46,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-07-13 19:54:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:46,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329397877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:46,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:46,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:46,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612308216] [2021-07-13 19:54:46,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:46,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:46,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:46,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:46,272 INFO L87 Difference]: Start difference. First operand 991 states and 2361 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:47,438 INFO L93 Difference]: Finished difference Result 2295 states and 5561 transitions. [2021-07-13 19:54:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:54:47,438 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:47,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:47,441 INFO L225 Difference]: With dead ends: 2295 [2021-07-13 19:54:47,441 INFO L226 Difference]: Without dead ends: 2275 [2021-07-13 19:54:47,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 872.0ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:54:47,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-07-13 19:54:47,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 989. [2021-07-13 19:54:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 2.383603238866397) internal successors, (2355), 988 states have internal predecessors, (2355), 0 states have call successors, (0), 0 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 19:54:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2355 transitions. [2021-07-13 19:54:47,456 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2355 transitions. Word has length 30 [2021-07-13 19:54:47,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:47,456 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 2355 transitions. [2021-07-13 19:54:47,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2355 transitions. [2021-07-13 19:54:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:47,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:47,458 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] [2021-07-13 19:54:47,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:47,679 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:47,680 INFO L82 PathProgramCache]: Analyzing trace with hash -508083499, now seen corresponding path program 23 times [2021-07-13 19:54:47,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:47,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856262849] [2021-07-13 19:54:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:47,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:47,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856262849] [2021-07-13 19:54:47,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856262849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:47,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90117547] [2021-07-13 19:54:47,922 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:47,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:47,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:47,947 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:47,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:48,133 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:54:48,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-07-13 19:54:48,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:48,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:48,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:48,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-07-13 19:54:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:48,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90117547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:48,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:48,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:48,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341138349] [2021-07-13 19:54:48,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:48,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:48,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:48,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:48,160 INFO L87 Difference]: Start difference. First operand 989 states and 2355 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:49,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:49,649 INFO L93 Difference]: Finished difference Result 2384 states and 5767 transitions. [2021-07-13 19:54:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:54:49,650 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:49,653 INFO L225 Difference]: With dead ends: 2384 [2021-07-13 19:54:49,653 INFO L226 Difference]: Without dead ends: 2347 [2021-07-13 19:54:49,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 983.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:54:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-07-13 19:54:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 974. [2021-07-13 19:54:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 2.3802672147995887) internal successors, (2316), 973 states have internal predecessors, (2316), 0 states have call successors, (0), 0 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 19:54:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 2316 transitions. [2021-07-13 19:54:49,669 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 2316 transitions. Word has length 30 [2021-07-13 19:54:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:49,669 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 2316 transitions. [2021-07-13 19:54:49,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 2316 transitions. [2021-07-13 19:54:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:49,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:49,670 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] [2021-07-13 19:54:49,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:49,871 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:49,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2141487853, now seen corresponding path program 24 times [2021-07-13 19:54:49,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:49,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359920245] [2021-07-13 19:54:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:50,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:50,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359920245] [2021-07-13 19:54:50,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359920245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:50,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014091300] [2021-07-13 19:54:50,169 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:50,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:50,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:50,199 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:50,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:50,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:54:50,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:50,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:50,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:50,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-07-13 19:54:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:50,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014091300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:50,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:50,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:50,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090535329] [2021-07-13 19:54:50,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:50,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:50,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:50,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:50,431 INFO L87 Difference]: Start difference. First operand 974 states and 2316 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:51,540 INFO L93 Difference]: Finished difference Result 2266 states and 5502 transitions. [2021-07-13 19:54:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:54:51,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:51,544 INFO L225 Difference]: With dead ends: 2266 [2021-07-13 19:54:51,544 INFO L226 Difference]: Without dead ends: 2256 [2021-07-13 19:54:51,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 782.9ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:54:51,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-07-13 19:54:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 971. [2021-07-13 19:54:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.3804123711340206) internal successors, (2309), 970 states have internal predecessors, (2309), 0 states have call successors, (0), 0 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 19:54:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2309 transitions. [2021-07-13 19:54:51,558 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2309 transitions. Word has length 30 [2021-07-13 19:54:51,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:51,558 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 2309 transitions. [2021-07-13 19:54:51,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2309 transitions. [2021-07-13 19:54:51,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:51,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:51,559 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] [2021-07-13 19:54:51,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:51,765 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:51,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:51,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1543469255, now seen corresponding path program 1 times [2021-07-13 19:54:51,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:51,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171963905] [2021-07-13 19:54:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:52,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:52,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171963905] [2021-07-13 19:54:52,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171963905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:52,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913457002] [2021-07-13 19:54:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:52,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:52,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:52,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:54:52,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:52,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:52,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:52,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:54:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:52,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913457002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:52,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:52,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:52,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128535220] [2021-07-13 19:54:52,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:52,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:52,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:52,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:52,224 INFO L87 Difference]: Start difference. First operand 971 states and 2309 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:54:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:53,267 INFO L93 Difference]: Finished difference Result 2326 states and 5643 transitions. [2021-07-13 19:54:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:54:53,268 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:54:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:53,271 INFO L225 Difference]: With dead ends: 2326 [2021-07-13 19:54:53,271 INFO L226 Difference]: Without dead ends: 2316 [2021-07-13 19:54:53,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 732.8ms TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:54:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-07-13 19:54:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1015. [2021-07-13 19:54:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 2.371794871794872) internal successors, (2405), 1014 states have internal predecessors, (2405), 0 states have call successors, (0), 0 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 19:54:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 2405 transitions. [2021-07-13 19:54:53,284 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 2405 transitions. Word has length 30 [2021-07-13 19:54:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:53,284 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 2405 transitions. [2021-07-13 19:54:53,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:54:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 2405 transitions. [2021-07-13 19:54:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:53,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:53,286 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] [2021-07-13 19:54:53,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-07-13 19:54:53,487 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash 334113745, now seen corresponding path program 2 times [2021-07-13 19:54:53,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:53,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123978404] [2021-07-13 19:54:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:53,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:53,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123978404] [2021-07-13 19:54:53,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123978404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:53,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312300346] [2021-07-13 19:54:53,726 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:53,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:53,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:53,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:53,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:54:53,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:53,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:53,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:53,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:54:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:53,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312300346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:53,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:53,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:54:53,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482150261] [2021-07-13 19:54:53,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:54:53,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:53,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:54:53,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:54:53,918 INFO L87 Difference]: Start difference. First operand 1015 states and 2405 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:54:55,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:55,046 INFO L93 Difference]: Finished difference Result 2579 states and 6285 transitions. [2021-07-13 19:54:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:54:55,046 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:54:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:55,050 INFO L225 Difference]: With dead ends: 2579 [2021-07-13 19:54:55,050 INFO L226 Difference]: Without dead ends: 2568 [2021-07-13 19:54:55,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 796.8ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:54:55,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-07-13 19:54:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1049. [2021-07-13 19:54:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 2.3807251908396947) internal successors, (2495), 1048 states have internal predecessors, (2495), 0 states have call successors, (0), 0 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 19:54:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2495 transitions. [2021-07-13 19:54:55,075 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2495 transitions. Word has length 30 [2021-07-13 19:54:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:55,075 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 2495 transitions. [2021-07-13 19:54:55,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:54:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2495 transitions. [2021-07-13 19:54:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:55,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:55,077 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] [2021-07-13 19:54:55,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:55,281 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:55,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2090514795, now seen corresponding path program 3 times [2021-07-13 19:54:55,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:55,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762894227] [2021-07-13 19:54:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:55,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:55,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762894227] [2021-07-13 19:54:55,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762894227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:55,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086038398] [2021-07-13 19:54:55,511 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:55,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:55,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:55,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:54:55,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:55,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:55,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:55,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:54:55,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:55,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:55,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:55,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:14 [2021-07-13 19:54:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:55,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086038398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:55,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:55,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-07-13 19:54:55,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033433278] [2021-07-13 19:54:55,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:54:55,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:55,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:54:55,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:54:55,840 INFO L87 Difference]: Start difference. First operand 1049 states and 2495 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 19:54:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:57,405 INFO L93 Difference]: Finished difference Result 2570 states and 6285 transitions. [2021-07-13 19:54:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:54:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 30 [2021-07-13 19:54:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:57,409 INFO L225 Difference]: With dead ends: 2570 [2021-07-13 19:54:57,409 INFO L226 Difference]: Without dead ends: 2558 [2021-07-13 19:54:57,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1211.3ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:54:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2021-07-13 19:54:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 1049. [2021-07-13 19:54:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 2.37881679389313) internal successors, (2493), 1048 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 19:54:57,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2493 transitions. [2021-07-13 19:54:57,424 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2493 transitions. Word has length 30 [2021-07-13 19:54:57,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:57,424 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 2493 transitions. [2021-07-13 19:54:57,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 19:54:57,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2493 transitions. [2021-07-13 19:54:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:57,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:57,425 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] [2021-07-13 19:54:57,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:57,626 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:57,626 INFO L82 PathProgramCache]: Analyzing trace with hash 519174883, now seen corresponding path program 4 times [2021-07-13 19:54:57,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:57,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174492157] [2021-07-13 19:54:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:57,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:57,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174492157] [2021-07-13 19:54:57,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174492157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:57,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511310654] [2021-07-13 19:54:57,863 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:57,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:57,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:57,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:58,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:54:58,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:58,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:58,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:58,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:54:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:58,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511310654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:58,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:58,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:54:58,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995519380] [2021-07-13 19:54:58,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:58,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:58,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:58,076 INFO L87 Difference]: Start difference. First operand 1049 states and 2493 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:59,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:59,365 INFO L93 Difference]: Finished difference Result 2493 states and 6029 transitions. [2021-07-13 19:54:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:54:59,365 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:54:59,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:59,368 INFO L225 Difference]: With dead ends: 2493 [2021-07-13 19:54:59,368 INFO L226 Difference]: Without dead ends: 2471 [2021-07-13 19:54:59,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 849.1ms TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:54:59,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-07-13 19:54:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1046. [2021-07-13 19:54:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.3779904306220097) internal successors, (2485), 1045 states have internal predecessors, (2485), 0 states have call successors, (0), 0 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 19:54:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 2485 transitions. [2021-07-13 19:54:59,382 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 2485 transitions. Word has length 30 [2021-07-13 19:54:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:59,382 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 2485 transitions. [2021-07-13 19:54:59,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:54:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 2485 transitions. [2021-07-13 19:54:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:59,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:59,383 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] [2021-07-13 19:54:59,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:59,584 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:59,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:59,584 INFO L82 PathProgramCache]: Analyzing trace with hash -794070141, now seen corresponding path program 5 times [2021-07-13 19:54:59,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:59,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486751102] [2021-07-13 19:54:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:59,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:59,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486751102] [2021-07-13 19:54:59,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486751102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:59,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036716842] [2021-07-13 19:54:59,824 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:59,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:59,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:59,847 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:59,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:00,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:55:00,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:00,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:00,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:00,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:55:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:00,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036716842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:00,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:00,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:55:00,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531989517] [2021-07-13 19:55:00,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:00,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:00,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:00,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:00,044 INFO L87 Difference]: Start difference. First operand 1046 states and 2485 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:00,973 INFO L93 Difference]: Finished difference Result 2312 states and 5616 transitions. [2021-07-13 19:55:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:55:00,974 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:55:00,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:00,976 INFO L225 Difference]: With dead ends: 2312 [2021-07-13 19:55:00,977 INFO L226 Difference]: Without dead ends: 2302 [2021-07-13 19:55:00,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 730.6ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:55:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-07-13 19:55:00,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1045. [2021-07-13 19:55:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.378352490421456) internal successors, (2483), 1044 states have internal predecessors, (2483), 0 states have call successors, (0), 0 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 19:55:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2483 transitions. [2021-07-13 19:55:00,990 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2483 transitions. Word has length 30 [2021-07-13 19:55:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:00,990 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2483 transitions. [2021-07-13 19:55:00,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2483 transitions. [2021-07-13 19:55:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:00,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:00,991 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] [2021-07-13 19:55:01,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:01,192 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:01,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1395219345, now seen corresponding path program 6 times [2021-07-13 19:55:01,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:01,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474321631] [2021-07-13 19:55:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:01,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:01,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474321631] [2021-07-13 19:55:01,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474321631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:01,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26550874] [2021-07-13 19:55:01,423 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:01,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:55:01,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:01,446 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:01,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:01,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:01,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 19:55:01,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:01,678 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.9 percent of original size [2021-07-13 19:55:01,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:01,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:60 [2021-07-13 19:55:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:01,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26550874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:01,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:01,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-07-13 19:55:01,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427832872] [2021-07-13 19:55:01,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:01,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:01,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:01,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:01,809 INFO L87 Difference]: Start difference. First operand 1045 states and 2483 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:03,778 INFO L93 Difference]: Finished difference Result 3125 states and 7618 transitions. [2021-07-13 19:55:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:55:03,778 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:55:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:03,782 INFO L225 Difference]: With dead ends: 3125 [2021-07-13 19:55:03,782 INFO L226 Difference]: Without dead ends: 3111 [2021-07-13 19:55:03,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1653.2ms TimeCoverageRelationStatistics Valid=548, Invalid=2002, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:55:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-07-13 19:55:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 1038. [2021-07-13 19:55:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 2.3751205400192865) internal successors, (2463), 1037 states have internal predecessors, (2463), 0 states have call successors, (0), 0 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 19:55:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 2463 transitions. [2021-07-13 19:55:03,799 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 2463 transitions. Word has length 30 [2021-07-13 19:55:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:03,799 INFO L482 AbstractCegarLoop]: Abstraction has 1038 states and 2463 transitions. [2021-07-13 19:55:03,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:03,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 2463 transitions. [2021-07-13 19:55:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:03,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:03,801 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] [2021-07-13 19:55:04,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:04,015 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:04,016 INFO L82 PathProgramCache]: Analyzing trace with hash 316882413, now seen corresponding path program 7 times [2021-07-13 19:55:04,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:04,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586645901] [2021-07-13 19:55:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:04,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586645901] [2021-07-13 19:55:04,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586645901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757437124] [2021-07-13 19:55:04,265 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:04,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:04,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:04,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:04,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:04,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:04,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:04,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:55:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:04,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757437124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:04,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:04,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:55:04,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087053544] [2021-07-13 19:55:04,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:04,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:04,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:04,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:04,486 INFO L87 Difference]: Start difference. First operand 1038 states and 2463 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:05,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:05,652 INFO L93 Difference]: Finished difference Result 2535 states and 6141 transitions. [2021-07-13 19:55:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:55:05,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:55:05,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:05,655 INFO L225 Difference]: With dead ends: 2535 [2021-07-13 19:55:05,655 INFO L226 Difference]: Without dead ends: 2517 [2021-07-13 19:55:05,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 809.4ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:55:05,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-07-13 19:55:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1015. [2021-07-13 19:55:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 2.371794871794872) internal successors, (2405), 1014 states have internal predecessors, (2405), 0 states have call successors, (0), 0 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 19:55:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 2405 transitions. [2021-07-13 19:55:05,674 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 2405 transitions. Word has length 30 [2021-07-13 19:55:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:05,674 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 2405 transitions. [2021-07-13 19:55:05,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 2405 transitions. [2021-07-13 19:55:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:05,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:05,675 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] [2021-07-13 19:55:05,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:05,876 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:05,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:05,876 INFO L82 PathProgramCache]: Analyzing trace with hash -2074262811, now seen corresponding path program 8 times [2021-07-13 19:55:05,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:05,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874226106] [2021-07-13 19:55:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:06,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:06,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874226106] [2021-07-13 19:55:06,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874226106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:06,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442634680] [2021-07-13 19:55:06,097 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:06,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:06,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:06,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:55:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:06,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:06,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 19:55:06,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:06,378 INFO L628 ElimStorePlain]: treesize reduction 6, result has 89.7 percent of original size [2021-07-13 19:55:06,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:06,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:52 [2021-07-13 19:55:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:06,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442634680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:06,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:06,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:55:06,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142986031] [2021-07-13 19:55:06,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:06,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:06,489 INFO L87 Difference]: Start difference. First operand 1015 states and 2405 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:55:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:07,744 INFO L93 Difference]: Finished difference Result 2436 states and 5950 transitions. [2021-07-13 19:55:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:55:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 30 [2021-07-13 19:55:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:07,748 INFO L225 Difference]: With dead ends: 2436 [2021-07-13 19:55:07,748 INFO L226 Difference]: Without dead ends: 2425 [2021-07-13 19:55:07,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1003.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:55:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-07-13 19:55:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1050. [2021-07-13 19:55:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 2.380362249761678) internal successors, (2497), 1049 states have internal predecessors, (2497), 0 states have call successors, (0), 0 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 19:55:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2497 transitions. [2021-07-13 19:55:07,762 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2497 transitions. Word has length 30 [2021-07-13 19:55:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:07,762 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 2497 transitions. [2021-07-13 19:55:07,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:55:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2497 transitions. [2021-07-13 19:55:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:07,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:07,763 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] [2021-07-13 19:55:07,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:07,963 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:07,964 INFO L82 PathProgramCache]: Analyzing trace with hash -317861761, now seen corresponding path program 9 times [2021-07-13 19:55:07,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:07,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362976298] [2021-07-13 19:55:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:08,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:08,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362976298] [2021-07-13 19:55:08,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362976298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:08,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840938357] [2021-07-13 19:55:08,196 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:08,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:08,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:08,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:08,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:08,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:08,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:08,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:08,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:08,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:55:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:08,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840938357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:08,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:08,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:55:08,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227164113] [2021-07-13 19:55:08,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:08,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:08,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:08,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:08,382 INFO L87 Difference]: Start difference. First operand 1050 states and 2497 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:09,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:09,546 INFO L93 Difference]: Finished difference Result 2686 states and 6580 transitions. [2021-07-13 19:55:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:55:09,547 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:55:09,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:09,550 INFO L225 Difference]: With dead ends: 2686 [2021-07-13 19:55:09,550 INFO L226 Difference]: Without dead ends: 2666 [2021-07-13 19:55:09,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 903.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:55:09,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-07-13 19:55:09,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 1034. [2021-07-13 19:55:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.3756050338818975) internal successors, (2454), 1033 states have internal predecessors, (2454), 0 states have call successors, (0), 0 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 19:55:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2454 transitions. [2021-07-13 19:55:09,565 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2454 transitions. Word has length 30 [2021-07-13 19:55:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:09,565 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 2454 transitions. [2021-07-13 19:55:09,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2454 transitions. [2021-07-13 19:55:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:09,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:09,566 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] [2021-07-13 19:55:09,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-13 19:55:09,768 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:09,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1889201673, now seen corresponding path program 10 times [2021-07-13 19:55:09,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:09,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114074814] [2021-07-13 19:55:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:09,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:09,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114074814] [2021-07-13 19:55:09,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114074814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:09,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494790977] [2021-07-13 19:55:09,994 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:10,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:10,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:10,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:10,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:10,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:55:10,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:10,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:10,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:10,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:55:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:10,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494790977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:10,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:10,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:55:10,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314273884] [2021-07-13 19:55:10,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:10,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:10,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:10,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:10,202 INFO L87 Difference]: Start difference. First operand 1034 states and 2454 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:11,270 INFO L93 Difference]: Finished difference Result 2442 states and 5915 transitions. [2021-07-13 19:55:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:55:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:55:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:11,273 INFO L225 Difference]: With dead ends: 2442 [2021-07-13 19:55:11,273 INFO L226 Difference]: Without dead ends: 2419 [2021-07-13 19:55:11,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 856.8ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:55:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-07-13 19:55:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 1019. [2021-07-13 19:55:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.3713163064833007) internal successors, (2414), 1018 states have internal predecessors, (2414), 0 states have call successors, (0), 0 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 19:55:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2414 transitions. [2021-07-13 19:55:11,287 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2414 transitions. Word has length 30 [2021-07-13 19:55:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:11,287 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 2414 transitions. [2021-07-13 19:55:11,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2414 transitions. [2021-07-13 19:55:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:11,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:11,288 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] [2021-07-13 19:55:11,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-13 19:55:11,489 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1092520599, now seen corresponding path program 11 times [2021-07-13 19:55:11,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:11,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459859509] [2021-07-13 19:55:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:11,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:11,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459859509] [2021-07-13 19:55:11,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459859509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:11,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976332263] [2021-07-13 19:55:11,710 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:11,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:55:11,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:11,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:11,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:11,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:55:11,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:11,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:11,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:11,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:55:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:11,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976332263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:11,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:11,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:55:11,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18459012] [2021-07-13 19:55:11,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:11,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:11,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:11,919 INFO L87 Difference]: Start difference. First operand 1019 states and 2414 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:12,936 INFO L93 Difference]: Finished difference Result 2279 states and 5538 transitions. [2021-07-13 19:55:12,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:55:12,936 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:55:12,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:12,939 INFO L225 Difference]: With dead ends: 2279 [2021-07-13 19:55:12,939 INFO L226 Difference]: Without dead ends: 2269 [2021-07-13 19:55:12,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 725.7ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:55:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-07-13 19:55:12,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1016. [2021-07-13 19:55:12,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.3714285714285714) internal successors, (2407), 1015 states have internal predecessors, (2407), 0 states have call successors, (0), 0 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 19:55:12,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2407 transitions. [2021-07-13 19:55:12,952 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2407 transitions. Word has length 30 [2021-07-13 19:55:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:12,952 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 2407 transitions. [2021-07-13 19:55:12,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2407 transitions. [2021-07-13 19:55:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:12,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:12,953 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] [2021-07-13 19:55:13,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-07-13 19:55:13,153 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1905442861, now seen corresponding path program 12 times [2021-07-13 19:55:13,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:13,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506634374] [2021-07-13 19:55:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:13,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:13,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506634374] [2021-07-13 19:55:13,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506634374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:13,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572423634] [2021-07-13 19:55:13,409 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:13,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:55:13,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:13,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:55:13,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:13,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:13,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 19:55:13,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:13,681 INFO L628 ElimStorePlain]: treesize reduction 10, result has 84.8 percent of original size [2021-07-13 19:55:13,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:13,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-07-13 19:55:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:13,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572423634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:13,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:13,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:55:13,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952891104] [2021-07-13 19:55:13,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:13,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:13,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:13,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:13,791 INFO L87 Difference]: Start difference. First operand 1016 states and 2407 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:55:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:15,310 INFO L93 Difference]: Finished difference Result 2411 states and 5871 transitions. [2021-07-13 19:55:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:55:15,311 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 30 [2021-07-13 19:55:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:15,313 INFO L225 Difference]: With dead ends: 2411 [2021-07-13 19:55:15,313 INFO L226 Difference]: Without dead ends: 2400 [2021-07-13 19:55:15,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1343.6ms TimeCoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:55:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-07-13 19:55:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1040. [2021-07-13 19:55:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.3753609239653515) internal successors, (2468), 1039 states have internal predecessors, (2468), 0 states have call successors, (0), 0 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 19:55:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2468 transitions. [2021-07-13 19:55:15,327 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2468 transitions. Word has length 30 [2021-07-13 19:55:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:15,327 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 2468 transitions. [2021-07-13 19:55:15,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:55:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2468 transitions. [2021-07-13 19:55:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:15,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:15,328 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] [2021-07-13 19:55:15,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:15,529 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:15,529 INFO L82 PathProgramCache]: Analyzing trace with hash -633123385, now seen corresponding path program 13 times [2021-07-13 19:55:15,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:15,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972775827] [2021-07-13 19:55:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:15,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:15,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972775827] [2021-07-13 19:55:15,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972775827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:15,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976015089] [2021-07-13 19:55:15,783 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:15,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:15,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:15,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:15,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:15,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:15,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:15,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:55:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:15,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976015089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:15,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:15,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:55:15,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638073861] [2021-07-13 19:55:15,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:15,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:15,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:15,966 INFO L87 Difference]: Start difference. First operand 1040 states and 2468 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:17,261 INFO L93 Difference]: Finished difference Result 2592 states and 6361 transitions. [2021-07-13 19:55:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:55:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:55:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:17,264 INFO L225 Difference]: With dead ends: 2592 [2021-07-13 19:55:17,265 INFO L226 Difference]: Without dead ends: 2572 [2021-07-13 19:55:17,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1098.6ms TimeCoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:55:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-07-13 19:55:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1028. [2021-07-13 19:55:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.372930866601753) internal successors, (2437), 1027 states have internal predecessors, (2437), 0 states have call successors, (0), 0 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 19:55:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2437 transitions. [2021-07-13 19:55:17,280 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2437 transitions. Word has length 30 [2021-07-13 19:55:17,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:17,281 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 2437 transitions. [2021-07-13 19:55:17,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2437 transitions. [2021-07-13 19:55:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:17,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:17,282 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] [2021-07-13 19:55:17,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-07-13 19:55:17,484 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash 895830683, now seen corresponding path program 14 times [2021-07-13 19:55:17,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:17,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238441528] [2021-07-13 19:55:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:17,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:17,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238441528] [2021-07-13 19:55:17,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238441528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:17,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532872613] [2021-07-13 19:55:17,756 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:17,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:17,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:17,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:55:17,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:17,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:17,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 19:55:17,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:18,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:18,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:18,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-07-13 19:55:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:18,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532872613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:18,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:18,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-13 19:55:18,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293017133] [2021-07-13 19:55:18,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:55:18,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:18,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:55:18,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:55:18,082 INFO L87 Difference]: Start difference. First operand 1028 states and 2437 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:20,088 INFO L93 Difference]: Finished difference Result 2575 states and 6256 transitions. [2021-07-13 19:55:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:55:20,088 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:55:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:20,091 INFO L225 Difference]: With dead ends: 2575 [2021-07-13 19:55:20,091 INFO L226 Difference]: Without dead ends: 2555 [2021-07-13 19:55:20,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1746.8ms TimeCoverageRelationStatistics Valid=590, Invalid=2166, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:55:20,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-07-13 19:55:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1019. [2021-07-13 19:55:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.3713163064833007) internal successors, (2414), 1018 states have internal predecessors, (2414), 0 states have call successors, (0), 0 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 19:55:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2414 transitions. [2021-07-13 19:55:20,105 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2414 transitions. Word has length 30 [2021-07-13 19:55:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:20,105 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 2414 transitions. [2021-07-13 19:55:20,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:20,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2414 transitions. [2021-07-13 19:55:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:20,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:20,106 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] [2021-07-13 19:55:20,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-07-13 19:55:20,307 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:20,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:20,307 INFO L82 PathProgramCache]: Analyzing trace with hash 578985487, now seen corresponding path program 15 times [2021-07-13 19:55:20,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:20,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180481236] [2021-07-13 19:55:20,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:20,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:20,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180481236] [2021-07-13 19:55:20,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180481236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:20,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962000562] [2021-07-13 19:55:20,591 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:20,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:20,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:20,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:20,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:20,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:55:20,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:20,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-07-13 19:55:20,972 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 19:55:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:21,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962000562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:21,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:21,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-13 19:55:21,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863737953] [2021-07-13 19:55:21,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:55:21,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:21,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:55:21,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:55:21,210 INFO L87 Difference]: Start difference. First operand 1019 states and 2414 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:21,527 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-07-13 19:55:22,694 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-07-13 19:55:22,983 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-13 19:55:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:23,788 INFO L93 Difference]: Finished difference Result 2304 states and 5623 transitions. [2021-07-13 19:55:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:55:23,788 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:55:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:23,791 INFO L225 Difference]: With dead ends: 2304 [2021-07-13 19:55:23,791 INFO L226 Difference]: Without dead ends: 2293 [2021-07-13 19:55:23,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 2499.8ms TimeCoverageRelationStatistics Valid=421, Invalid=2441, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:55:23,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-07-13 19:55:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1032. [2021-07-13 19:55:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 2.372453928225024) internal successors, (2446), 1031 states have internal predecessors, (2446), 0 states have call successors, (0), 0 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 19:55:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 2446 transitions. [2021-07-13 19:55:23,805 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 2446 transitions. Word has length 30 [2021-07-13 19:55:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:23,805 INFO L482 AbstractCegarLoop]: Abstraction has 1032 states and 2446 transitions. [2021-07-13 19:55:23,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 2446 transitions. [2021-07-13 19:55:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:23,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:23,807 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] [2021-07-13 19:55:24,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-07-13 19:55:24,007 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:24,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1959580759, now seen corresponding path program 16 times [2021-07-13 19:55:24,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:24,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319336307] [2021-07-13 19:55:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:24,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:24,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319336307] [2021-07-13 19:55:24,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319336307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:24,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999044397] [2021-07-13 19:55:24,290 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:24,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:24,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:24,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:24,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:24,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:24,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:24,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:24,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:24,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:55:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:24,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999044397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:24,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:24,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:55:24,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486091085] [2021-07-13 19:55:24,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:24,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:24,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:24,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:24,482 INFO L87 Difference]: Start difference. First operand 1032 states and 2446 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:25,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:25,965 INFO L93 Difference]: Finished difference Result 2584 states and 6335 transitions. [2021-07-13 19:55:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:55:25,966 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:55:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:25,969 INFO L225 Difference]: With dead ends: 2584 [2021-07-13 19:55:25,969 INFO L226 Difference]: Without dead ends: 2564 [2021-07-13 19:55:25,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1264.2ms TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:55:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2021-07-13 19:55:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1022. [2021-07-13 19:55:25,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.3712047012732613) internal successors, (2421), 1021 states have internal predecessors, (2421), 0 states have call successors, (0), 0 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 19:55:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2421 transitions. [2021-07-13 19:55:25,984 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2421 transitions. Word has length 30 [2021-07-13 19:55:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:25,984 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 2421 transitions. [2021-07-13 19:55:25,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2421 transitions. [2021-07-13 19:55:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:25,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:25,985 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] [2021-07-13 19:55:26,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:26,185 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:26,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1759811339, now seen corresponding path program 17 times [2021-07-13 19:55:26,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:26,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292876261] [2021-07-13 19:55:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:26,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292876261] [2021-07-13 19:55:26,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292876261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226988101] [2021-07-13 19:55:26,424 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:26,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:55:26,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:26,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:26,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:26,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:26,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:55:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:26,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226988101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:26,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:26,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:55:26,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713730543] [2021-07-13 19:55:26,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:26,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:26,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:26,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:26,617 INFO L87 Difference]: Start difference. First operand 1022 states and 2421 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:55:28,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:28,562 INFO L93 Difference]: Finished difference Result 2728 states and 6710 transitions. [2021-07-13 19:55:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:55:28,562 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:55:28,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:28,566 INFO L225 Difference]: With dead ends: 2728 [2021-07-13 19:55:28,566 INFO L226 Difference]: Without dead ends: 2718 [2021-07-13 19:55:28,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1483.5ms TimeCoverageRelationStatistics Valid=392, Invalid=2158, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:55:28,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2021-07-13 19:55:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 1022. [2021-07-13 19:55:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.3712047012732613) internal successors, (2421), 1021 states have internal predecessors, (2421), 0 states have call successors, (0), 0 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 19:55:28,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2421 transitions. [2021-07-13 19:55:28,581 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2421 transitions. Word has length 30 [2021-07-13 19:55:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:28,581 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 2421 transitions. [2021-07-13 19:55:28,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:55:28,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2421 transitions. [2021-07-13 19:55:28,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:28,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:28,582 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] [2021-07-13 19:55:28,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-07-13 19:55:28,783 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:28,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:28,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1045600267, now seen corresponding path program 18 times [2021-07-13 19:55:28,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:28,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528557072] [2021-07-13 19:55:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:29,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:29,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528557072] [2021-07-13 19:55:29,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528557072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:29,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181079183] [2021-07-13 19:55:29,023 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:29,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:55:29,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:29,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:29,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:29,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:29,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 19:55:29,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:29,276 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:55:29,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-07-13 19:55:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:29,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181079183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:29,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:29,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-13 19:55:29,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006155797] [2021-07-13 19:55:29,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:55:29,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:29,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:55:29,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:29,374 INFO L87 Difference]: Start difference. First operand 1022 states and 2421 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 19:55:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:31,798 INFO L93 Difference]: Finished difference Result 2314 states and 5640 transitions. [2021-07-13 19:55:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:55:31,799 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 30 [2021-07-13 19:55:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:31,802 INFO L225 Difference]: With dead ends: 2314 [2021-07-13 19:55:31,802 INFO L226 Difference]: Without dead ends: 2305 [2021-07-13 19:55:31,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1707.5ms TimeCoverageRelationStatistics Valid=347, Invalid=3075, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:55:31,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-07-13 19:55:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1021. [2021-07-13 19:55:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 2.3715686274509804) internal successors, (2419), 1020 states have internal predecessors, (2419), 0 states have call successors, (0), 0 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 19:55:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2419 transitions. [2021-07-13 19:55:31,815 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2419 transitions. Word has length 30 [2021-07-13 19:55:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:31,815 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 2419 transitions. [2021-07-13 19:55:31,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 19:55:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2419 transitions. [2021-07-13 19:55:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:31,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:31,816 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] [2021-07-13 19:55:32,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-07-13 19:55:32,018 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:32,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:32,018 INFO L82 PathProgramCache]: Analyzing trace with hash -462514351, now seen corresponding path program 19 times [2021-07-13 19:55:32,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:32,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359607044] [2021-07-13 19:55:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:32,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:32,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359607044] [2021-07-13 19:55:32,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359607044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:32,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400836566] [2021-07-13 19:55:32,258 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:32,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:32,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:32,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:32,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:32,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:55:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:32,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400836566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:32,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:32,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-07-13 19:55:32,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354170746] [2021-07-13 19:55:32,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:32,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:32,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:32,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:32,485 INFO L87 Difference]: Start difference. First operand 1021 states and 2419 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:34,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:34,220 INFO L93 Difference]: Finished difference Result 2365 states and 5774 transitions. [2021-07-13 19:55:34,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:55:34,221 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:55:34,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:34,224 INFO L225 Difference]: With dead ends: 2365 [2021-07-13 19:55:34,224 INFO L226 Difference]: Without dead ends: 2356 [2021-07-13 19:55:34,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1124.4ms TimeCoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:55:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-07-13 19:55:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1036. [2021-07-13 19:55:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.373913043478261) internal successors, (2457), 1035 states have internal predecessors, (2457), 0 states have call successors, (0), 0 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 19:55:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2457 transitions. [2021-07-13 19:55:34,238 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2457 transitions. Word has length 30 [2021-07-13 19:55:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:34,238 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2457 transitions. [2021-07-13 19:55:34,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2457 transitions. [2021-07-13 19:55:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:34,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:34,239 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] [2021-07-13 19:55:34,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-07-13 19:55:34,441 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:34,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:34,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1955559275, now seen corresponding path program 20 times [2021-07-13 19:55:34,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:34,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982551256] [2021-07-13 19:55:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:34,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:34,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982551256] [2021-07-13 19:55:34,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982551256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:34,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431709895] [2021-07-13 19:55:34,727 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:34,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:34,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:34,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:34,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:34,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:34,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:34,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:34,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:34,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:55:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:34,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431709895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:34,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:34,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:55:34,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357371912] [2021-07-13 19:55:34,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:34,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:34,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:34,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:34,931 INFO L87 Difference]: Start difference. First operand 1036 states and 2457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 19:55:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:36,614 INFO L93 Difference]: Finished difference Result 2424 states and 5947 transitions. [2021-07-13 19:55:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:55:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 30 [2021-07-13 19:55:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:36,617 INFO L225 Difference]: With dead ends: 2424 [2021-07-13 19:55:36,618 INFO L226 Difference]: Without dead ends: 2413 [2021-07-13 19:55:36,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1257.3ms TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:55:36,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-07-13 19:55:36,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1051. [2021-07-13 19:55:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 2.375238095238095) internal successors, (2494), 1050 states have internal predecessors, (2494), 0 states have call successors, (0), 0 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 19:55:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 2494 transitions. [2021-07-13 19:55:36,632 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 2494 transitions. Word has length 30 [2021-07-13 19:55:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:36,632 INFO L482 AbstractCegarLoop]: Abstraction has 1051 states and 2494 transitions. [2021-07-13 19:55:36,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 19:55:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 2494 transitions. [2021-07-13 19:55:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:36,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:36,633 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] [2021-07-13 19:55:36,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-07-13 19:55:36,833 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:36,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1820757867, now seen corresponding path program 21 times [2021-07-13 19:55:36,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:36,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366782952] [2021-07-13 19:55:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:37,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:37,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366782952] [2021-07-13 19:55:37,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366782952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:37,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714994943] [2021-07-13 19:55:37,072 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:37,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:55:37,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:37,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:37,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:37,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:37,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:37,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:37,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:37,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:55:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:37,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714994943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:37,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:37,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:55:37,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709566185] [2021-07-13 19:55:37,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:37,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:37,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:37,271 INFO L87 Difference]: Start difference. First operand 1051 states and 2494 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 19:55:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:39,003 INFO L93 Difference]: Finished difference Result 2535 states and 6230 transitions. [2021-07-13 19:55:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:55:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 30 [2021-07-13 19:55:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:39,007 INFO L225 Difference]: With dead ends: 2535 [2021-07-13 19:55:39,007 INFO L226 Difference]: Without dead ends: 2515 [2021-07-13 19:55:39,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1310.9ms TimeCoverageRelationStatistics Valid=342, Invalid=1914, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:55:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-07-13 19:55:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 1039. [2021-07-13 19:55:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 2.373795761078998) internal successors, (2464), 1038 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 19:55:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 2464 transitions. [2021-07-13 19:55:39,022 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 2464 transitions. Word has length 30 [2021-07-13 19:55:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:39,022 INFO L482 AbstractCegarLoop]: Abstraction has 1039 states and 2464 transitions. [2021-07-13 19:55:39,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 19:55:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 2464 transitions. [2021-07-13 19:55:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:39,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:39,023 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] [2021-07-13 19:55:39,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:39,224 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:39,224 INFO L82 PathProgramCache]: Analyzing trace with hash -675951543, now seen corresponding path program 22 times [2021-07-13 19:55:39,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:39,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947069269] [2021-07-13 19:55:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:39,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:39,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947069269] [2021-07-13 19:55:39,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947069269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:39,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326900411] [2021-07-13 19:55:39,461 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:39,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:39,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:39,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:39,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:39,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:39,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:39,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:39,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:39,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:55:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:39,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326900411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:39,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:39,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-07-13 19:55:39,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597210931] [2021-07-13 19:55:39,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:39,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:39,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:39,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:39,693 INFO L87 Difference]: Start difference. First operand 1039 states and 2464 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:55:41,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:41,529 INFO L93 Difference]: Finished difference Result 2343 states and 5723 transitions. [2021-07-13 19:55:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:55:41,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:55:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:41,533 INFO L225 Difference]: With dead ends: 2343 [2021-07-13 19:55:41,533 INFO L226 Difference]: Without dead ends: 2334 [2021-07-13 19:55:41,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1232.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:55:41,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-07-13 19:55:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1033. [2021-07-13 19:55:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.374031007751938) internal successors, (2450), 1032 states have internal predecessors, (2450), 0 states have call successors, (0), 0 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 19:55:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2450 transitions. [2021-07-13 19:55:41,547 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2450 transitions. Word has length 30 [2021-07-13 19:55:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:41,547 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2450 transitions. [2021-07-13 19:55:41,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:55:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2450 transitions. [2021-07-13 19:55:41,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:41,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:41,548 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] [2021-07-13 19:55:41,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-07-13 19:55:41,749 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:41,749 INFO L82 PathProgramCache]: Analyzing trace with hash 309204733, now seen corresponding path program 23 times [2021-07-13 19:55:41,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:41,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659633550] [2021-07-13 19:55:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:42,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:42,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659633550] [2021-07-13 19:55:42,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659633550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:42,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490087434] [2021-07-13 19:55:42,049 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:42,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:55:42,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:42,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:42,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:42,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:42,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:42,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:42,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:42,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:55:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:42,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490087434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:42,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:42,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:55:42,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732471497] [2021-07-13 19:55:42,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:42,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:42,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:42,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:42,246 INFO L87 Difference]: Start difference. First operand 1033 states and 2450 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:43,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:43,484 INFO L93 Difference]: Finished difference Result 2466 states and 6019 transitions. [2021-07-13 19:55:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:55:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:55:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:43,488 INFO L225 Difference]: With dead ends: 2466 [2021-07-13 19:55:43,488 INFO L226 Difference]: Without dead ends: 2455 [2021-07-13 19:55:43,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 946.2ms TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:55:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-07-13 19:55:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1057. [2021-07-13 19:55:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.377840909090909) internal successors, (2511), 1056 states have internal predecessors, (2511), 0 states have call successors, (0), 0 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 19:55:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2511 transitions. [2021-07-13 19:55:43,509 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2511 transitions. Word has length 30 [2021-07-13 19:55:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:43,509 INFO L482 AbstractCegarLoop]: Abstraction has 1057 states and 2511 transitions. [2021-07-13 19:55:43,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:43,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2511 transitions. [2021-07-13 19:55:43,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:43,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:43,510 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] [2021-07-13 19:55:43,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:43,710 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:43,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2065605783, now seen corresponding path program 24 times [2021-07-13 19:55:43,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:43,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704843443] [2021-07-13 19:55:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:43,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:43,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704843443] [2021-07-13 19:55:43,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704843443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:43,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770312211] [2021-07-13 19:55:43,985 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:44,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:55:44,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:44,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:44,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:44,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:44,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:44,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:44,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:44,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:55:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:44,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770312211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:44,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:44,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:55:44,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65001121] [2021-07-13 19:55:44,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:44,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:44,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:44,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:44,170 INFO L87 Difference]: Start difference. First operand 1057 states and 2511 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:45,638 INFO L93 Difference]: Finished difference Result 2596 states and 6370 transitions. [2021-07-13 19:55:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:55:45,639 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:55:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:45,642 INFO L225 Difference]: With dead ends: 2596 [2021-07-13 19:55:45,642 INFO L226 Difference]: Without dead ends: 2576 [2021-07-13 19:55:45,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1159.3ms TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:55:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-07-13 19:55:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1045. [2021-07-13 19:55:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.375478927203065) internal successors, (2480), 1044 states have internal predecessors, (2480), 0 states have call successors, (0), 0 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 19:55:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2480 transitions. [2021-07-13 19:55:45,656 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2480 transitions. Word has length 30 [2021-07-13 19:55:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:45,656 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2480 transitions. [2021-07-13 19:55:45,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:55:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2480 transitions. [2021-07-13 19:55:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:45,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:45,658 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] [2021-07-13 19:55:45,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:45,858 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:45,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash -700407445, now seen corresponding path program 25 times [2021-07-13 19:55:45,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:45,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382297101] [2021-07-13 19:55:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:46,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382297101] [2021-07-13 19:55:46,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382297101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131177642] [2021-07-13 19:55:46,160 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:46,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:46,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:46,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:55:46,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:46,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:46,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:46,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:55:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:46,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131177642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:46,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:46,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:55:46,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332657901] [2021-07-13 19:55:46,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:46,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:46,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:46,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:46,370 INFO L87 Difference]: Start difference. First operand 1045 states and 2480 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:47,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:47,743 INFO L93 Difference]: Finished difference Result 2258 states and 5490 transitions. [2021-07-13 19:55:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:55:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:55:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:47,746 INFO L225 Difference]: With dead ends: 2258 [2021-07-13 19:55:47,746 INFO L226 Difference]: Without dead ends: 2235 [2021-07-13 19:55:47,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1146.9ms TimeCoverageRelationStatistics Valid=355, Invalid=1285, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:55:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-07-13 19:55:47,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1036. [2021-07-13 19:55:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.373913043478261) internal successors, (2457), 1035 states have internal predecessors, (2457), 0 states have call successors, (0), 0 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 19:55:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2457 transitions. [2021-07-13 19:55:47,759 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2457 transitions. Word has length 30 [2021-07-13 19:55:47,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:47,759 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2457 transitions. [2021-07-13 19:55:47,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:47,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2457 transitions. [2021-07-13 19:55:47,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:47,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:47,760 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] [2021-07-13 19:55:47,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable340 [2021-07-13 19:55:47,961 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:47,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:47,961 INFO L82 PathProgramCache]: Analyzing trace with hash 373838239, now seen corresponding path program 26 times [2021-07-13 19:55:47,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:47,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593850326] [2021-07-13 19:55:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:48,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:48,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593850326] [2021-07-13 19:55:48,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593850326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:48,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651521635] [2021-07-13 19:55:48,269 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:48,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:48,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:48,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:55:48,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:48,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:48,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:48,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:48,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 41 [2021-07-13 19:55:48,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:48,560 INFO L628 ElimStorePlain]: treesize reduction 6, result has 92.4 percent of original size [2021-07-13 19:55:48,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:48,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:73 [2021-07-13 19:55:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:48,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651521635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:48,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:48,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:55:48,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034052324] [2021-07-13 19:55:48,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:48,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:48,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:48,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:48,706 INFO L87 Difference]: Start difference. First operand 1036 states and 2457 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:55:50,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:50,574 INFO L93 Difference]: Finished difference Result 2392 states and 5841 transitions. [2021-07-13 19:55:50,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:55:50,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 30 [2021-07-13 19:55:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:50,578 INFO L225 Difference]: With dead ends: 2392 [2021-07-13 19:55:50,578 INFO L226 Difference]: Without dead ends: 2381 [2021-07-13 19:55:50,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1626.2ms TimeCoverageRelationStatistics Valid=407, Invalid=1849, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:55:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-07-13 19:55:50,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1057. [2021-07-13 19:55:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.375) internal successors, (2508), 1056 states have internal predecessors, (2508), 0 states have call successors, (0), 0 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 19:55:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2508 transitions. [2021-07-13 19:55:50,592 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2508 transitions. Word has length 30 [2021-07-13 19:55:50,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:50,592 INFO L482 AbstractCegarLoop]: Abstraction has 1057 states and 2508 transitions. [2021-07-13 19:55:50,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:55:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2508 transitions. [2021-07-13 19:55:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:50,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:50,594 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] [2021-07-13 19:55:50,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:50,794 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:50,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:50,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2130239289, now seen corresponding path program 27 times [2021-07-13 19:55:50,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:50,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845051249] [2021-07-13 19:55:50,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:51,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:51,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845051249] [2021-07-13 19:55:51,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845051249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:51,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290223277] [2021-07-13 19:55:51,101 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:51,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:51,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:51,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:51,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:51,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:51,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:55:51,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:51,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:51,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:51,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-07-13 19:55:51,445 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 19:55:51,721 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-07-13 19:55:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:51,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290223277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:51,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:51,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-13 19:55:51,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702724430] [2021-07-13 19:55:51,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:55:51,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:55:51,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:55:51,759 INFO L87 Difference]: Start difference. First operand 1057 states and 2508 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:52,062 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-13 19:55:54,212 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-13 19:55:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:54,448 INFO L93 Difference]: Finished difference Result 2521 states and 6168 transitions. [2021-07-13 19:55:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:55:54,449 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:55:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:54,452 INFO L225 Difference]: With dead ends: 2521 [2021-07-13 19:55:54,452 INFO L226 Difference]: Without dead ends: 2508 [2021-07-13 19:55:54,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2667.1ms TimeCoverageRelationStatistics Valid=538, Invalid=2768, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:55:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-07-13 19:55:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 1053. [2021-07-13 19:55:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 2.3745247148288975) internal successors, (2498), 1052 states have internal predecessors, (2498), 0 states have call successors, (0), 0 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 19:55:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2498 transitions. [2021-07-13 19:55:54,467 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2498 transitions. Word has length 30 [2021-07-13 19:55:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:54,467 INFO L482 AbstractCegarLoop]: Abstraction has 1053 states and 2498 transitions. [2021-07-13 19:55:54,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:54,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2498 transitions. [2021-07-13 19:55:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:54,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:54,468 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] [2021-07-13 19:55:54,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-07-13 19:55:54,668 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1212289099, now seen corresponding path program 28 times [2021-07-13 19:55:54,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:54,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193635091] [2021-07-13 19:55:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:54,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:54,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193635091] [2021-07-13 19:55:54,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193635091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:54,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85056187] [2021-07-13 19:55:54,979 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:55,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:55,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:55,003 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:55,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:55,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:55,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:55,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:55,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:55,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:55:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:55,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85056187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:55,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:55,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:55:55,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022014709] [2021-07-13 19:55:55,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:55,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:55,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:55,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:55,194 INFO L87 Difference]: Start difference. First operand 1053 states and 2498 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:57,344 INFO L93 Difference]: Finished difference Result 2872 states and 7002 transitions. [2021-07-13 19:55:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:55:57,344 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:55:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:57,348 INFO L225 Difference]: With dead ends: 2872 [2021-07-13 19:55:57,348 INFO L226 Difference]: Without dead ends: 2854 [2021-07-13 19:55:57,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1798.9ms TimeCoverageRelationStatistics Valid=613, Invalid=2693, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:55:57,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-07-13 19:55:57,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1048. [2021-07-13 19:55:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.373447946513849) internal successors, (2485), 1047 states have internal predecessors, (2485), 0 states have call successors, (0), 0 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 19:55:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2485 transitions. [2021-07-13 19:55:57,363 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2485 transitions. Word has length 30 [2021-07-13 19:55:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:57,363 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 2485 transitions. [2021-07-13 19:55:57,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:55:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2485 transitions. [2021-07-13 19:55:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:57,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:57,365 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] [2021-07-13 19:55:57,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:57,565 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1964958587, now seen corresponding path program 29 times [2021-07-13 19:55:57,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:57,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292878268] [2021-07-13 19:55:57,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:57,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:57,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292878268] [2021-07-13 19:55:57,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292878268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:57,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327624458] [2021-07-13 19:55:57,822 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:57,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:55:57,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:57,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:55:57,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:57,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:55:57,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:57,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:57,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:57,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:55:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:58,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327624458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:58,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:58,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:55:58,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015112805] [2021-07-13 19:55:58,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:58,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:58,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:58,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:58,022 INFO L87 Difference]: Start difference. First operand 1048 states and 2485 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:55:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:59,968 INFO L93 Difference]: Finished difference Result 2791 states and 6868 transitions. [2021-07-13 19:55:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:55:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:55:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:59,972 INFO L225 Difference]: With dead ends: 2791 [2021-07-13 19:55:59,972 INFO L226 Difference]: Without dead ends: 2776 [2021-07-13 19:55:59,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1501.1ms TimeCoverageRelationStatistics Valid=418, Invalid=2132, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:55:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-07-13 19:55:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 1039. [2021-07-13 19:55:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 2.373795761078998) internal successors, (2464), 1038 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 19:55:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 2464 transitions. [2021-07-13 19:55:59,987 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 2464 transitions. Word has length 30 [2021-07-13 19:55:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:59,987 INFO L482 AbstractCegarLoop]: Abstraction has 1039 states and 2464 transitions. [2021-07-13 19:55:59,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:55:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 2464 transitions. [2021-07-13 19:55:59,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:59,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:59,989 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] [2021-07-13 19:56:00,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:00,189 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:00,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:00,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1250747515, now seen corresponding path program 30 times [2021-07-13 19:56:00,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:00,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695752829] [2021-07-13 19:56:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:00,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:00,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695752829] [2021-07-13 19:56:00,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695752829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:00,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390308839] [2021-07-13 19:56:00,459 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:00,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:56:00,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:00,488 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:00,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:00,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 19:56:00,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:56:00,724 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 19:56:00,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:00,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-07-13 19:56:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:00,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390308839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:00,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:00,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-13 19:56:00,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865414780] [2021-07-13 19:56:00,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:00,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:00,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:00,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:00,820 INFO L87 Difference]: Start difference. First operand 1039 states and 2464 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 19:56:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:04,192 INFO L93 Difference]: Finished difference Result 2522 states and 6156 transitions. [2021-07-13 19:56:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 19:56:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 30 [2021-07-13 19:56:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:04,197 INFO L225 Difference]: With dead ends: 2522 [2021-07-13 19:56:04,197 INFO L226 Difference]: Without dead ends: 2513 [2021-07-13 19:56:04,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 2444.9ms TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 19:56:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-07-13 19:56:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1041. [2021-07-13 19:56:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 2.373076923076923) internal successors, (2468), 1040 states have internal predecessors, (2468), 0 states have call successors, (0), 0 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 19:56:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 2468 transitions. [2021-07-13 19:56:04,216 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 2468 transitions. Word has length 30 [2021-07-13 19:56:04,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:04,216 INFO L482 AbstractCegarLoop]: Abstraction has 1041 states and 2468 transitions. [2021-07-13 19:56:04,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 19:56:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 2468 transitions. [2021-07-13 19:56:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:04,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:04,218 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] [2021-07-13 19:56:04,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:04,439 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:04,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:04,439 INFO L82 PathProgramCache]: Analyzing trace with hash 513543889, now seen corresponding path program 31 times [2021-07-13 19:56:04,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:04,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573398315] [2021-07-13 19:56:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:04,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:04,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573398315] [2021-07-13 19:56:04,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573398315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:04,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344237515] [2021-07-13 19:56:04,755 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:04,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:04,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:04,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:56:04,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:04,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:04,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:04,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:56:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:05,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344237515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:05,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:05,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:56:05,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685782665] [2021-07-13 19:56:05,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:05,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:05,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:05,008 INFO L87 Difference]: Start difference. First operand 1041 states and 2468 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:56:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:06,291 INFO L93 Difference]: Finished difference Result 2556 states and 6245 transitions. [2021-07-13 19:56:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:56:06,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:56:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:06,296 INFO L225 Difference]: With dead ends: 2556 [2021-07-13 19:56:06,296 INFO L226 Difference]: Without dead ends: 2545 [2021-07-13 19:56:06,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1002.7ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:56:06,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-07-13 19:56:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 1076. [2021-07-13 19:56:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1075 states have (on average 2.3813953488372093) internal successors, (2560), 1075 states have internal predecessors, (2560), 0 states have call successors, (0), 0 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 19:56:06,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 2560 transitions. [2021-07-13 19:56:06,321 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 2560 transitions. Word has length 30 [2021-07-13 19:56:06,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:06,321 INFO L482 AbstractCegarLoop]: Abstraction has 1076 states and 2560 transitions. [2021-07-13 19:56:06,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:56:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 2560 transitions. [2021-07-13 19:56:06,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:06,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:06,322 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] [2021-07-13 19:56:06,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:06,544 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:06,544 INFO L82 PathProgramCache]: Analyzing trace with hash -2025022357, now seen corresponding path program 32 times [2021-07-13 19:56:06,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:06,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858614556] [2021-07-13 19:56:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:06,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:06,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858614556] [2021-07-13 19:56:06,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858614556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:06,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143242465] [2021-07-13 19:56:06,771 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:06,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:06,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:06,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:56:06,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:07,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:07,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 19:56:07,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:56:07,061 INFO L628 ElimStorePlain]: treesize reduction 6, result has 89.7 percent of original size [2021-07-13 19:56:07,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:07,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:52 [2021-07-13 19:56:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:07,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143242465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:07,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:07,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:07,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160236856] [2021-07-13 19:56:07,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:07,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:07,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:07,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:07,158 INFO L87 Difference]: Start difference. First operand 1076 states and 2560 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:56:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:08,497 INFO L93 Difference]: Finished difference Result 2647 states and 6512 transitions. [2021-07-13 19:56:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:56:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 30 [2021-07-13 19:56:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:08,501 INFO L225 Difference]: With dead ends: 2647 [2021-07-13 19:56:08,501 INFO L226 Difference]: Without dead ends: 2635 [2021-07-13 19:56:08,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1154.6ms TimeCoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:56:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-07-13 19:56:08,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1107. [2021-07-13 19:56:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1106 states have (on average 2.387884267631103) internal successors, (2641), 1106 states have internal predecessors, (2641), 0 states have call successors, (0), 0 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 19:56:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 2641 transitions. [2021-07-13 19:56:08,527 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 2641 transitions. Word has length 30 [2021-07-13 19:56:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:08,527 INFO L482 AbstractCegarLoop]: Abstraction has 1107 states and 2641 transitions. [2021-07-13 19:56:08,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:56:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 2641 transitions. [2021-07-13 19:56:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:08,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:08,529 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] [2021-07-13 19:56:08,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-07-13 19:56:08,729 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1351994749, now seen corresponding path program 33 times [2021-07-13 19:56:08,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:08,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315786214] [2021-07-13 19:56:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:08,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:08,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315786214] [2021-07-13 19:56:08,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315786214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:08,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083802204] [2021-07-13 19:56:08,982 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:09,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:09,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:09,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:09,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:09,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:56:09,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:09,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:09,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:09,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:56:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:09,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083802204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:09,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:09,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:56:09,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480557176] [2021-07-13 19:56:09,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:09,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:09,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:09,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:09,201 INFO L87 Difference]: Start difference. First operand 1107 states and 2641 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:10,604 INFO L93 Difference]: Finished difference Result 2939 states and 7188 transitions. [2021-07-13 19:56:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:56:10,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:56:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:10,608 INFO L225 Difference]: With dead ends: 2939 [2021-07-13 19:56:10,608 INFO L226 Difference]: Without dead ends: 2917 [2021-07-13 19:56:10,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1089.6ms TimeCoverageRelationStatistics Valid=417, Invalid=1563, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:56:10,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-07-13 19:56:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 1060. [2021-07-13 19:56:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 2.376770538243626) internal successors, (2517), 1059 states have internal predecessors, (2517), 0 states have call successors, (0), 0 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 19:56:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 2517 transitions. [2021-07-13 19:56:10,624 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 2517 transitions. Word has length 30 [2021-07-13 19:56:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:10,624 INFO L482 AbstractCegarLoop]: Abstraction has 1060 states and 2517 transitions. [2021-07-13 19:56:10,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:10,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 2517 transitions. [2021-07-13 19:56:10,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:10,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:10,625 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] [2021-07-13 19:56:10,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-07-13 19:56:10,825 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:10,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:10,826 INFO L82 PathProgramCache]: Analyzing trace with hash 698605027, now seen corresponding path program 34 times [2021-07-13 19:56:10,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:10,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732208930] [2021-07-13 19:56:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:11,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:11,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732208930] [2021-07-13 19:56:11,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732208930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:11,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494738378] [2021-07-13 19:56:11,081 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:11,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:11,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:11,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:11,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:11,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:56:11,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:11,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:11,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:11,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:56:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:11,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494738378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:11,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:11,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:56:11,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195963316] [2021-07-13 19:56:11,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:11,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:11,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:11,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:11,293 INFO L87 Difference]: Start difference. First operand 1060 states and 2517 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:12,417 INFO L93 Difference]: Finished difference Result 2435 states and 5897 transitions. [2021-07-13 19:56:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:56:12,417 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:56:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:12,420 INFO L225 Difference]: With dead ends: 2435 [2021-07-13 19:56:12,420 INFO L226 Difference]: Without dead ends: 2412 [2021-07-13 19:56:12,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 892.4ms TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:56:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-13 19:56:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1045. [2021-07-13 19:56:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.3726053639846745) internal successors, (2477), 1044 states have internal predecessors, (2477), 0 states have call successors, (0), 0 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 19:56:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2477 transitions. [2021-07-13 19:56:12,434 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2477 transitions. Word has length 30 [2021-07-13 19:56:12,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:12,434 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2477 transitions. [2021-07-13 19:56:12,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2477 transitions. [2021-07-13 19:56:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:12,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:12,441 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] [2021-07-13 19:56:12,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-13 19:56:12,642 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:12,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:12,642 INFO L82 PathProgramCache]: Analyzing trace with hash -614639997, now seen corresponding path program 35 times [2021-07-13 19:56:12,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:12,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620616995] [2021-07-13 19:56:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:12,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:12,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620616995] [2021-07-13 19:56:12,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620616995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:12,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674788819] [2021-07-13 19:56:12,929 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:12,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:56:12,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:12,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:12,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:13,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:56:13,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:13,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:13,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:13,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:56:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:13,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674788819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:13,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:13,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:56:13,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940253168] [2021-07-13 19:56:13,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:13,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:13,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:13,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:13,156 INFO L87 Difference]: Start difference. First operand 1045 states and 2477 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:14,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:14,041 INFO L93 Difference]: Finished difference Result 2319 states and 5633 transitions. [2021-07-13 19:56:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:56:14,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:56:14,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:14,045 INFO L225 Difference]: With dead ends: 2319 [2021-07-13 19:56:14,045 INFO L226 Difference]: Without dead ends: 2309 [2021-07-13 19:56:14,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 786.9ms TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:56:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-07-13 19:56:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1042. [2021-07-13 19:56:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.372718539865514) internal successors, (2470), 1041 states have internal predecessors, (2470), 0 states have call successors, (0), 0 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 19:56:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2470 transitions. [2021-07-13 19:56:14,060 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2470 transitions. Word has length 30 [2021-07-13 19:56:14,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:14,060 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 2470 transitions. [2021-07-13 19:56:14,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2470 transitions. [2021-07-13 19:56:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:14,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:14,062 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] [2021-07-13 19:56:14,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-13 19:56:14,262 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash 198282265, now seen corresponding path program 36 times [2021-07-13 19:56:14,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:14,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360581912] [2021-07-13 19:56:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:14,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:14,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360581912] [2021-07-13 19:56:14,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360581912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:14,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361979747] [2021-07-13 19:56:14,573 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:14,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:56:14,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:14,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:56:14,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:14,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:14,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 19:56:14,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:56:14,849 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.3 percent of original size [2021-07-13 19:56:14,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:14,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-07-13 19:56:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:14,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361979747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:14,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:14,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:14,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86211344] [2021-07-13 19:56:14,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:14,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:14,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:14,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:14,953 INFO L87 Difference]: Start difference. First operand 1042 states and 2470 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:56:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:16,452 INFO L93 Difference]: Finished difference Result 2426 states and 5913 transitions. [2021-07-13 19:56:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:56:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 30 [2021-07-13 19:56:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:16,456 INFO L225 Difference]: With dead ends: 2426 [2021-07-13 19:56:16,456 INFO L226 Difference]: Without dead ends: 2415 [2021-07-13 19:56:16,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1320.6ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:56:16,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-07-13 19:56:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1067. [2021-07-13 19:56:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 2.376172607879925) internal successors, (2533), 1066 states have internal predecessors, (2533), 0 states have call successors, (0), 0 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 19:56:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 2533 transitions. [2021-07-13 19:56:16,479 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 2533 transitions. Word has length 30 [2021-07-13 19:56:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:16,480 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 2533 transitions. [2021-07-13 19:56:16,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:56:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 2533 transitions. [2021-07-13 19:56:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:16,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:16,481 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] [2021-07-13 19:56:16,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-13 19:56:16,682 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:16,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:16,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1954683315, now seen corresponding path program 37 times [2021-07-13 19:56:16,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:16,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169533929] [2021-07-13 19:56:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:16,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:16,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169533929] [2021-07-13 19:56:16,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169533929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:16,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129449033] [2021-07-13 19:56:16,938 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:16,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:17,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:56:17,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:17,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:17,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:17,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:56:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:17,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129449033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:17,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:17,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:56:17,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888358216] [2021-07-13 19:56:17,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:17,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:17,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:17,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:17,123 INFO L87 Difference]: Start difference. First operand 1067 states and 2533 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:56:18,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:18,380 INFO L93 Difference]: Finished difference Result 2651 states and 6517 transitions. [2021-07-13 19:56:18,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:56:18,381 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:56:18,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:18,384 INFO L225 Difference]: With dead ends: 2651 [2021-07-13 19:56:18,384 INFO L226 Difference]: Without dead ends: 2631 [2021-07-13 19:56:18,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1038.5ms TimeCoverageRelationStatistics Valid=342, Invalid=1380, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:56:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-07-13 19:56:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1067. [2021-07-13 19:56:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 2.376172607879925) internal successors, (2533), 1066 states have internal predecessors, (2533), 0 states have call successors, (0), 0 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 19:56:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 2533 transitions. [2021-07-13 19:56:18,407 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 2533 transitions. Word has length 30 [2021-07-13 19:56:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:18,407 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 2533 transitions. [2021-07-13 19:56:18,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:56:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 2533 transitions. [2021-07-13 19:56:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:18,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:18,408 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] [2021-07-13 19:56:18,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:18,616 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:18,616 INFO L82 PathProgramCache]: Analyzing trace with hash -811329913, now seen corresponding path program 38 times [2021-07-13 19:56:18,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:18,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056711354] [2021-07-13 19:56:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:18,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:18,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056711354] [2021-07-13 19:56:18,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056711354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:18,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622033191] [2021-07-13 19:56:18,884 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:18,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:18,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:18,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:56:18,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:19,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:19,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 19:56:19,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:19,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:19,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:19,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-07-13 19:56:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:19,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622033191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:19,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:19,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-13 19:56:19,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42721292] [2021-07-13 19:56:19,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:56:19,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:19,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:56:19,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:19,227 INFO L87 Difference]: Start difference. First operand 1067 states and 2533 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:21,214 INFO L93 Difference]: Finished difference Result 2587 states and 6285 transitions. [2021-07-13 19:56:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:56:21,215 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:56:21,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:21,218 INFO L225 Difference]: With dead ends: 2587 [2021-07-13 19:56:21,218 INFO L226 Difference]: Without dead ends: 2567 [2021-07-13 19:56:21,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1665.7ms TimeCoverageRelationStatistics Valid=573, Invalid=2079, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:56:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-07-13 19:56:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 1058. [2021-07-13 19:56:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 2.3746452223273415) internal successors, (2510), 1057 states have internal predecessors, (2510), 0 states have call successors, (0), 0 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 19:56:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2510 transitions. [2021-07-13 19:56:21,235 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2510 transitions. Word has length 30 [2021-07-13 19:56:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:21,235 INFO L482 AbstractCegarLoop]: Abstraction has 1058 states and 2510 transitions. [2021-07-13 19:56:21,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:21,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2510 transitions. [2021-07-13 19:56:21,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:21,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:21,237 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] [2021-07-13 19:56:21,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:21,437 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:21,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1128175109, now seen corresponding path program 39 times [2021-07-13 19:56:21,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:21,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574303936] [2021-07-13 19:56:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:21,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:21,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574303936] [2021-07-13 19:56:21,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574303936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:21,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710127965] [2021-07-13 19:56:21,719 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:21,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:21,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:21,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:21,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:21,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:56:21,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:21,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:21,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:21,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-07-13 19:56:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:22,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710127965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:22,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:22,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-13 19:56:22,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553455029] [2021-07-13 19:56:22,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:56:22,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:22,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:56:22,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:22,309 INFO L87 Difference]: Start difference. First operand 1058 states and 2510 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:22,623 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-07-13 19:56:22,949 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-13 19:56:23,860 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-07-13 19:56:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:24,854 INFO L93 Difference]: Finished difference Result 2375 states and 5793 transitions. [2021-07-13 19:56:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:56:24,854 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:56:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:24,857 INFO L225 Difference]: With dead ends: 2375 [2021-07-13 19:56:24,857 INFO L226 Difference]: Without dead ends: 2364 [2021-07-13 19:56:24,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 2468.3ms TimeCoverageRelationStatistics Valid=452, Invalid=2518, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:56:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-07-13 19:56:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1071. [2021-07-13 19:56:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 2.3757009345794393) internal successors, (2542), 1070 states have internal predecessors, (2542), 0 states have call successors, (0), 0 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 19:56:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 2542 transitions. [2021-07-13 19:56:24,871 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 2542 transitions. Word has length 30 [2021-07-13 19:56:24,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:24,871 INFO L482 AbstractCegarLoop]: Abstraction has 1071 states and 2542 transitions. [2021-07-13 19:56:24,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 2542 transitions. [2021-07-13 19:56:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:24,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:24,872 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] [2021-07-13 19:56:25,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2021-07-13 19:56:25,072 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash 628225941, now seen corresponding path program 40 times [2021-07-13 19:56:25,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:25,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259888418] [2021-07-13 19:56:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:25,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:25,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259888418] [2021-07-13 19:56:25,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259888418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:25,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922934450] [2021-07-13 19:56:25,358 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:25,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:25,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:25,380 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:25,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:56:25,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:25,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:25,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:25,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:56:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:25,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922934450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:25,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:25,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:56:25,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589953209] [2021-07-13 19:56:25,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:25,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:25,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:25,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:25,568 INFO L87 Difference]: Start difference. First operand 1071 states and 2542 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:56:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:27,211 INFO L93 Difference]: Finished difference Result 2674 states and 6561 transitions. [2021-07-13 19:56:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:56:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 30 [2021-07-13 19:56:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:27,215 INFO L225 Difference]: With dead ends: 2674 [2021-07-13 19:56:27,215 INFO L226 Difference]: Without dead ends: 2654 [2021-07-13 19:56:27,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1369.3ms TimeCoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:56:27,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-07-13 19:56:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 1062. [2021-07-13 19:56:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 2.3741753063147972) internal successors, (2519), 1061 states have internal predecessors, (2519), 0 states have call successors, (0), 0 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 19:56:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 2519 transitions. [2021-07-13 19:56:27,230 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 2519 transitions. Word has length 30 [2021-07-13 19:56:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:27,230 INFO L482 AbstractCegarLoop]: Abstraction has 1062 states and 2519 transitions. [2021-07-13 19:56:27,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 19:56:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 2519 transitions. [2021-07-13 19:56:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:27,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:27,231 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] [2021-07-13 19:56:27,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-07-13 19:56:27,432 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:27,432 INFO L82 PathProgramCache]: Analyzing trace with hash 827995361, now seen corresponding path program 41 times [2021-07-13 19:56:27,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:27,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253125731] [2021-07-13 19:56:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:27,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:27,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253125731] [2021-07-13 19:56:27,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253125731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:27,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833026936] [2021-07-13 19:56:27,666 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:27,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:27,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:27,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:27,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:27,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:56:27,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:27,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:27,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:27,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:56:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:27,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833026936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:27,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:27,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:56:27,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925847051] [2021-07-13 19:56:27,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:56:27,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:27,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:56:27,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:27,850 INFO L87 Difference]: Start difference. First operand 1062 states and 2519 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:56:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:29,702 INFO L93 Difference]: Finished difference Result 2797 states and 6881 transitions. [2021-07-13 19:56:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:56:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:56:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:29,706 INFO L225 Difference]: With dead ends: 2797 [2021-07-13 19:56:29,706 INFO L226 Difference]: Without dead ends: 2782 [2021-07-13 19:56:29,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1451.9ms TimeCoverageRelationStatistics Valid=415, Invalid=2135, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:56:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2021-07-13 19:56:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 1055. [2021-07-13 19:56:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.3747628083491463) internal successors, (2503), 1054 states have internal predecessors, (2503), 0 states have call successors, (0), 0 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 19:56:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2503 transitions. [2021-07-13 19:56:29,722 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2503 transitions. Word has length 30 [2021-07-13 19:56:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:29,722 INFO L482 AbstractCegarLoop]: Abstraction has 1055 states and 2503 transitions. [2021-07-13 19:56:29,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:56:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2503 transitions. [2021-07-13 19:56:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:29,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:29,723 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] [2021-07-13 19:56:29,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:29,924 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1542206433, now seen corresponding path program 42 times [2021-07-13 19:56:29,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:29,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639281206] [2021-07-13 19:56:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:30,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:30,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639281206] [2021-07-13 19:56:30,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639281206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:30,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636516961] [2021-07-13 19:56:30,165 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:30,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:56:30,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:30,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:30,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:30,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:56:30,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:30,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:30,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:30,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:56:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:30,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636516961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:30,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:30,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-07-13 19:56:30,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255253835] [2021-07-13 19:56:30,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:30,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:30,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:30,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:30,375 INFO L87 Difference]: Start difference. First operand 1055 states and 2503 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:56:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:31,893 INFO L93 Difference]: Finished difference Result 2352 states and 5740 transitions. [2021-07-13 19:56:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:56:31,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:56:31,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:31,896 INFO L225 Difference]: With dead ends: 2352 [2021-07-13 19:56:31,896 INFO L226 Difference]: Without dead ends: 2343 [2021-07-13 19:56:31,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1028.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:56:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2021-07-13 19:56:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 1054. [2021-07-13 19:56:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.375118708452042) internal successors, (2501), 1053 states have internal predecessors, (2501), 0 states have call successors, (0), 0 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 19:56:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 2501 transitions. [2021-07-13 19:56:31,911 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 2501 transitions. Word has length 30 [2021-07-13 19:56:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:31,911 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 2501 transitions. [2021-07-13 19:56:31,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:56:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 2501 transitions. [2021-07-13 19:56:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:31,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:31,912 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] [2021-07-13 19:56:32,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-07-13 19:56:32,113 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1502809619, now seen corresponding path program 25 times [2021-07-13 19:56:32,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:32,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654535386] [2021-07-13 19:56:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:32,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:32,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654535386] [2021-07-13 19:56:32,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654535386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:32,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3029101] [2021-07-13 19:56:32,390 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:32,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:32,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:32,604 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 19:56:32,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-07-13 19:56:32,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:32,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:32,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:32,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-07-13 19:56:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:32,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3029101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:32,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:32,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:56:32,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446809774] [2021-07-13 19:56:32,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:32,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:32,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:32,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:32,632 INFO L87 Difference]: Start difference. First operand 1054 states and 2501 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:34,485 INFO L93 Difference]: Finished difference Result 2280 states and 5531 transitions. [2021-07-13 19:56:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:56:34,485 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:56:34,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:34,488 INFO L225 Difference]: With dead ends: 2280 [2021-07-13 19:56:34,488 INFO L226 Difference]: Without dead ends: 2260 [2021-07-13 19:56:34,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1362.1ms TimeCoverageRelationStatistics Valid=444, Invalid=2208, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:56:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-07-13 19:56:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1049. [2021-07-13 19:56:34,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 2.3759541984732824) internal successors, (2490), 1048 states have internal predecessors, (2490), 0 states have call successors, (0), 0 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 19:56:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2490 transitions. [2021-07-13 19:56:34,502 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2490 transitions. Word has length 30 [2021-07-13 19:56:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:34,502 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 2490 transitions. [2021-07-13 19:56:34,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2490 transitions. [2021-07-13 19:56:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:34,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:34,503 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] [2021-07-13 19:56:34,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:34,703 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash 238831011, now seen corresponding path program 26 times [2021-07-13 19:56:34,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:34,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242006157] [2021-07-13 19:56:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:34,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:34,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242006157] [2021-07-13 19:56:34,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242006157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:34,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859530897] [2021-07-13 19:56:34,955 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:34,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:34,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:34,979 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:56:34,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:35,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:35,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 19:56:35,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:35,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-07-13 19:56:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:35,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859530897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:35,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:35,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:35,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805329791] [2021-07-13 19:56:35,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:35,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:35,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:35,279 INFO L87 Difference]: Start difference. First operand 1049 states and 2490 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:56:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:37,676 INFO L93 Difference]: Finished difference Result 2513 states and 6135 transitions. [2021-07-13 19:56:37,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:56:37,676 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 30 [2021-07-13 19:56:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:37,680 INFO L225 Difference]: With dead ends: 2513 [2021-07-13 19:56:37,680 INFO L226 Difference]: Without dead ends: 2484 [2021-07-13 19:56:37,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1984.5ms TimeCoverageRelationStatistics Valid=579, Invalid=2843, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:56:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-07-13 19:56:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1031. [2021-07-13 19:56:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.376699029126214) internal successors, (2448), 1030 states have internal predecessors, (2448), 0 states have call successors, (0), 0 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 19:56:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2448 transitions. [2021-07-13 19:56:37,697 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2448 transitions. Word has length 30 [2021-07-13 19:56:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:37,697 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 2448 transitions. [2021-07-13 19:56:37,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:56:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2448 transitions. [2021-07-13 19:56:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:37,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:37,699 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] [2021-07-13 19:56:37,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable405 [2021-07-13 19:56:37,899 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:37,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:37,899 INFO L82 PathProgramCache]: Analyzing trace with hash -161084473, now seen corresponding path program 43 times [2021-07-13 19:56:37,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:37,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962347282] [2021-07-13 19:56:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:38,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:38,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962347282] [2021-07-13 19:56:38,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962347282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:38,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863261409] [2021-07-13 19:56:38,160 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:38,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:38,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:56:38,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:38,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:38,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:38,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:56:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:38,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863261409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:38,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:38,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-07-13 19:56:38,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932357094] [2021-07-13 19:56:38,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:38,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:38,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:38,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:38,368 INFO L87 Difference]: Start difference. First operand 1031 states and 2448 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:56:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:40,044 INFO L93 Difference]: Finished difference Result 2318 states and 5663 transitions. [2021-07-13 19:56:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:56:40,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:56:40,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:40,047 INFO L225 Difference]: With dead ends: 2318 [2021-07-13 19:56:40,047 INFO L226 Difference]: Without dead ends: 2309 [2021-07-13 19:56:40,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1071.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:56:40,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-07-13 19:56:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1023. [2021-07-13 19:56:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.3767123287671232) internal successors, (2429), 1022 states have internal predecessors, (2429), 0 states have call successors, (0), 0 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 19:56:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2429 transitions. [2021-07-13 19:56:40,060 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2429 transitions. Word has length 30 [2021-07-13 19:56:40,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:40,061 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 2429 transitions. [2021-07-13 19:56:40,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:56:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2429 transitions. [2021-07-13 19:56:40,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:40,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:40,062 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] [2021-07-13 19:56:40,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-13 19:56:40,262 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:40,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:40,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1359235047, now seen corresponding path program 44 times [2021-07-13 19:56:40,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:40,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655841259] [2021-07-13 19:56:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:40,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:40,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655841259] [2021-07-13 19:56:40,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655841259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:40,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942666394] [2021-07-13 19:56:40,515 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:40,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:40,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:40,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:56:40,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:40,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:40,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 19:56:40,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:56:40,792 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.9 percent of original size [2021-07-13 19:56:40,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:40,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:60 [2021-07-13 19:56:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:40,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942666394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:40,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:40,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:40,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076904638] [2021-07-13 19:56:40,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:40,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:40,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:40,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:40,896 INFO L87 Difference]: Start difference. First operand 1023 states and 2429 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:56:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:42,540 INFO L93 Difference]: Finished difference Result 2386 states and 5821 transitions. [2021-07-13 19:56:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:56:42,541 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 30 [2021-07-13 19:56:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:42,544 INFO L225 Difference]: With dead ends: 2386 [2021-07-13 19:56:42,544 INFO L226 Difference]: Without dead ends: 2371 [2021-07-13 19:56:42,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1333.7ms TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:56:42,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-07-13 19:56:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1011. [2021-07-13 19:56:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 2.375247524752475) internal successors, (2399), 1010 states have internal predecessors, (2399), 0 states have call successors, (0), 0 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 19:56:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2399 transitions. [2021-07-13 19:56:42,557 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2399 transitions. Word has length 30 [2021-07-13 19:56:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:42,558 INFO L482 AbstractCegarLoop]: Abstraction has 1011 states and 2399 transitions. [2021-07-13 19:56:42,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 19:56:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2399 transitions. [2021-07-13 19:56:42,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:42,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:42,559 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] [2021-07-13 19:56:42,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-07-13 19:56:42,759 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:42,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1926120071, now seen corresponding path program 45 times [2021-07-13 19:56:42,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:42,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959101734] [2021-07-13 19:56:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:43,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:43,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959101734] [2021-07-13 19:56:43,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959101734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:43,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964160140] [2021-07-13 19:56:43,017 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:43,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:43,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:43,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:43,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:56:43,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:43,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:43,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:43,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:56:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:43,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964160140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:43,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:43,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:56:43,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910612001] [2021-07-13 19:56:43,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:43,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:43,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:43,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:43,235 INFO L87 Difference]: Start difference. First operand 1011 states and 2399 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:44,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:44,341 INFO L93 Difference]: Finished difference Result 2268 states and 5516 transitions. [2021-07-13 19:56:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:56:44,342 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 19:56:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:44,345 INFO L225 Difference]: With dead ends: 2268 [2021-07-13 19:56:44,345 INFO L226 Difference]: Without dead ends: 2245 [2021-07-13 19:56:44,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 954.9ms TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:56:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2021-07-13 19:56:44,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 996. [2021-07-13 19:56:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 2.3738693467336685) internal successors, (2362), 995 states have internal predecessors, (2362), 0 states have call successors, (0), 0 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 19:56:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 2362 transitions. [2021-07-13 19:56:44,358 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 2362 transitions. Word has length 30 [2021-07-13 19:56:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:44,358 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 2362 transitions. [2021-07-13 19:56:44,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:56:44,358 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 2362 transitions. [2021-07-13 19:56:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:44,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:44,359 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] [2021-07-13 19:56:44,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:44,560 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:44,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:44,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2007475803, now seen corresponding path program 27 times [2021-07-13 19:56:44,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:44,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078721240] [2021-07-13 19:56:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:44,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078721240] [2021-07-13 19:56:44,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078721240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097210929] [2021-07-13 19:56:44,813 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:44,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:44,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:44,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:44,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:45,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:56:45,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:45,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:45,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:45,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:56:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:45,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097210929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:45,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:45,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-13 19:56:45,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199192837] [2021-07-13 19:56:45,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:45,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:45,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:45,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:45,044 INFO L87 Difference]: Start difference. First operand 996 states and 2362 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:46,391 INFO L93 Difference]: Finished difference Result 2380 states and 5830 transitions. [2021-07-13 19:56:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:56:46,391 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:46,394 INFO L225 Difference]: With dead ends: 2380 [2021-07-13 19:56:46,394 INFO L226 Difference]: Without dead ends: 2371 [2021-07-13 19:56:46,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 917.9ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:56:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-07-13 19:56:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1021. [2021-07-13 19:56:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 2.3784313725490196) internal successors, (2426), 1020 states have internal predecessors, (2426), 0 states have call successors, (0), 0 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 19:56:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2426 transitions. [2021-07-13 19:56:46,410 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2426 transitions. Word has length 30 [2021-07-13 19:56:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:46,410 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 2426 transitions. [2021-07-13 19:56:46,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2426 transitions. [2021-07-13 19:56:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:46,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:46,411 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] [2021-07-13 19:56:46,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:46,611 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:46,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2107974053, now seen corresponding path program 28 times [2021-07-13 19:56:46,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:46,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535374995] [2021-07-13 19:56:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:46,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:46,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535374995] [2021-07-13 19:56:46,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535374995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:46,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207498727] [2021-07-13 19:56:46,861 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:46,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:46,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:46,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:47,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:56:47,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:47,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:47,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:47,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-07-13 19:56:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:47,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207498727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:47,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:47,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 19:56:47,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793629606] [2021-07-13 19:56:47,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:47,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:47,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:47,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:47,088 INFO L87 Difference]: Start difference. First operand 1021 states and 2426 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:56:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:48,370 INFO L93 Difference]: Finished difference Result 2434 states and 5974 transitions. [2021-07-13 19:56:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:56:48,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:56:48,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:48,374 INFO L225 Difference]: With dead ends: 2434 [2021-07-13 19:56:48,374 INFO L226 Difference]: Without dead ends: 2423 [2021-07-13 19:56:48,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1059.3ms TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:56:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-07-13 19:56:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1047. [2021-07-13 19:56:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 2.38527724665392) internal successors, (2495), 1046 states have internal predecessors, (2495), 0 states have call successors, (0), 0 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 19:56:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 2495 transitions. [2021-07-13 19:56:48,389 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 2495 transitions. Word has length 30 [2021-07-13 19:56:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:48,389 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 2495 transitions. [2021-07-13 19:56:48,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:56:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 2495 transitions. [2021-07-13 19:56:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:48,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:48,391 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] [2021-07-13 19:56:48,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-13 19:56:48,600 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:48,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2052191835, now seen corresponding path program 29 times [2021-07-13 19:56:48,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:48,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026576335] [2021-07-13 19:56:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:48,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:48,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026576335] [2021-07-13 19:56:48,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026576335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:48,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829751486] [2021-07-13 19:56:48,846 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:48,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:56:48,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:48,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:49,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:56:49,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:49,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:49,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:49,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:56:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:49,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829751486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:49,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:49,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:56:49,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127502910] [2021-07-13 19:56:49,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:49,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:49,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:49,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:49,103 INFO L87 Difference]: Start difference. First operand 1047 states and 2495 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:56:50,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:50,282 INFO L93 Difference]: Finished difference Result 2490 states and 6119 transitions. [2021-07-13 19:56:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:56:50,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:56:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:50,285 INFO L225 Difference]: With dead ends: 2490 [2021-07-13 19:56:50,285 INFO L226 Difference]: Without dead ends: 2470 [2021-07-13 19:56:50,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1016.0ms TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:56:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-13 19:56:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 1026. [2021-07-13 19:56:50,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 2.3814634146341462) internal successors, (2441), 1025 states have internal predecessors, (2441), 0 states have call successors, (0), 0 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 19:56:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 2441 transitions. [2021-07-13 19:56:50,300 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 2441 transitions. Word has length 30 [2021-07-13 19:56:50,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:50,300 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 2441 transitions. [2021-07-13 19:56:50,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:56:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 2441 transitions. [2021-07-13 19:56:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:50,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:50,301 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] [2021-07-13 19:56:50,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-13 19:56:50,502 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1820445923, now seen corresponding path program 30 times [2021-07-13 19:56:50,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:50,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079431587] [2021-07-13 19:56:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:50,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:50,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079431587] [2021-07-13 19:56:50,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079431587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:50,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382979045] [2021-07-13 19:56:50,765 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:50,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:56:50,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:50,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:56:50,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:50,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:50,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 19:56:50,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:51,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:51,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:51,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-07-13 19:56:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:51,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382979045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:51,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:51,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-07-13 19:56:51,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148991110] [2021-07-13 19:56:51,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:56:51,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:51,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:56:51,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:56:51,097 INFO L87 Difference]: Start difference. First operand 1026 states and 2441 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:52,721 INFO L93 Difference]: Finished difference Result 2414 states and 5917 transitions. [2021-07-13 19:56:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:56:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:52,724 INFO L225 Difference]: With dead ends: 2414 [2021-07-13 19:56:52,724 INFO L226 Difference]: Without dead ends: 2403 [2021-07-13 19:56:52,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1337.5ms TimeCoverageRelationStatistics Valid=401, Invalid=2149, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:56:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-07-13 19:56:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 1041. [2021-07-13 19:56:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 2.3826923076923077) internal successors, (2478), 1040 states have internal predecessors, (2478), 0 states have call successors, (0), 0 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 19:56:52,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 2478 transitions. [2021-07-13 19:56:52,737 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 2478 transitions. Word has length 30 [2021-07-13 19:56:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:52,737 INFO L482 AbstractCegarLoop]: Abstraction has 1041 states and 2478 transitions. [2021-07-13 19:56:52,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:52,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 2478 transitions. [2021-07-13 19:56:52,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:52,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:52,739 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] [2021-07-13 19:56:52,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-13 19:56:52,939 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:52,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:52,939 INFO L82 PathProgramCache]: Analyzing trace with hash -64044873, now seen corresponding path program 31 times [2021-07-13 19:56:52,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:52,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897921925] [2021-07-13 19:56:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:53,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:53,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897921925] [2021-07-13 19:56:53,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897921925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:53,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930756856] [2021-07-13 19:56:53,198 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:53,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:53,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:53,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:56:53,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:53,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:53,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:53,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-07-13 19:56:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:53,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930756856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:53,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:53,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 19:56:53,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13047683] [2021-07-13 19:56:53,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:53,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:53,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:53,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:53,423 INFO L87 Difference]: Start difference. First operand 1041 states and 2478 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:54,837 INFO L93 Difference]: Finished difference Result 2538 states and 6238 transitions. [2021-07-13 19:56:54,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:56:54,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:54,841 INFO L225 Difference]: With dead ends: 2538 [2021-07-13 19:56:54,841 INFO L226 Difference]: Without dead ends: 2518 [2021-07-13 19:56:54,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1134.4ms TimeCoverageRelationStatistics Valid=345, Invalid=1725, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:56:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-07-13 19:56:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1029. [2021-07-13 19:56:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 2.380350194552529) internal successors, (2447), 1028 states have internal predecessors, (2447), 0 states have call successors, (0), 0 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 19:56:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 2447 transitions. [2021-07-13 19:56:54,856 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 2447 transitions. Word has length 30 [2021-07-13 19:56:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:54,856 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 2447 transitions. [2021-07-13 19:56:54,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 2447 transitions. [2021-07-13 19:56:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:54,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:54,857 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] [2021-07-13 19:56:55,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:55,058 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash 471399335, now seen corresponding path program 32 times [2021-07-13 19:56:55,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:55,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373554938] [2021-07-13 19:56:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:55,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:55,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373554938] [2021-07-13 19:56:55,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373554938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:55,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655983543] [2021-07-13 19:56:55,319 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:55,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:55,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:55,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:55,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:55,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:56:55,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:55,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:55,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:55,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:56:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:55,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655983543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:55,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:55,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 19:56:55,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303296661] [2021-07-13 19:56:55,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:55,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:55,551 INFO L87 Difference]: Start difference. First operand 1029 states and 2447 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:57,005 INFO L93 Difference]: Finished difference Result 2258 states and 5490 transitions. [2021-07-13 19:56:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:56:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:57,009 INFO L225 Difference]: With dead ends: 2258 [2021-07-13 19:56:57,009 INFO L226 Difference]: Without dead ends: 2238 [2021-07-13 19:56:57,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1090.7ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:56:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-07-13 19:56:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1023. [2021-07-13 19:56:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.3816046966731896) internal successors, (2434), 1022 states have internal predecessors, (2434), 0 states have call successors, (0), 0 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 19:56:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2434 transitions. [2021-07-13 19:56:57,023 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2434 transitions. Word has length 30 [2021-07-13 19:56:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:57,023 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 2434 transitions. [2021-07-13 19:56:57,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2434 transitions. [2021-07-13 19:56:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:57,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:57,025 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] [2021-07-13 19:56:57,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-07-13 19:56:57,225 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash -792579273, now seen corresponding path program 33 times [2021-07-13 19:56:57,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:57,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591830159] [2021-07-13 19:56:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:57,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:57,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591830159] [2021-07-13 19:56:57,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591830159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:57,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635118763] [2021-07-13 19:56:57,492 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:57,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:57,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:57,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:57,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:56:57,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:57,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:57,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:57,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-07-13 19:56:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:57,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635118763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:57,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:57,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 19:56:57,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221766442] [2021-07-13 19:56:57,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:57,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:57,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:57,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:57,715 INFO L87 Difference]: Start difference. First operand 1023 states and 2434 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:59,531 INFO L93 Difference]: Finished difference Result 2636 states and 6471 transitions. [2021-07-13 19:56:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:56:59,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:59,535 INFO L225 Difference]: With dead ends: 2636 [2021-07-13 19:56:59,535 INFO L226 Difference]: Without dead ends: 2625 [2021-07-13 19:56:59,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1441.3ms TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:56:59,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-07-13 19:56:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1072. [2021-07-13 19:56:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 2.388422035480859) internal successors, (2558), 1071 states have internal predecessors, (2558), 0 states have call successors, (0), 0 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 19:56:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 2558 transitions. [2021-07-13 19:56:59,551 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 2558 transitions. Word has length 30 [2021-07-13 19:56:59,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:59,551 INFO L482 AbstractCegarLoop]: Abstraction has 1072 states and 2558 transitions. [2021-07-13 19:56:59,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:59,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 2558 transitions. [2021-07-13 19:56:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:59,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:59,552 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] [2021-07-13 19:56:59,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:59,753 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash 963821777, now seen corresponding path program 34 times [2021-07-13 19:56:59,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:59,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107561243] [2021-07-13 19:56:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:00,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:00,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107561243] [2021-07-13 19:57:00,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107561243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:00,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754235523] [2021-07-13 19:57:00,001 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:00,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:00,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:00,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:00,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:00,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:00,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:00,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:00,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:00,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:57:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:00,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754235523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:00,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:00,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 19:57:00,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596711285] [2021-07-13 19:57:00,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:00,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:00,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:00,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:00,227 INFO L87 Difference]: Start difference. First operand 1072 states and 2558 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:01,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:01,961 INFO L93 Difference]: Finished difference Result 2723 states and 6714 transitions. [2021-07-13 19:57:01,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:57:01,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:01,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:01,965 INFO L225 Difference]: With dead ends: 2723 [2021-07-13 19:57:01,965 INFO L226 Difference]: Without dead ends: 2701 [2021-07-13 19:57:01,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1339.9ms TimeCoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:57:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-07-13 19:57:01,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 1074. [2021-07-13 19:57:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.386766076421249) internal successors, (2561), 1073 states have internal predecessors, (2561), 0 states have call successors, (0), 0 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 19:57:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2561 transitions. [2021-07-13 19:57:01,979 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2561 transitions. Word has length 30 [2021-07-13 19:57:01,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:01,979 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 2561 transitions. [2021-07-13 19:57:01,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2561 transitions. [2021-07-13 19:57:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:01,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:01,981 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] [2021-07-13 19:57:02,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:02,181 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:02,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1499265985, now seen corresponding path program 35 times [2021-07-13 19:57:02,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:02,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705706420] [2021-07-13 19:57:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:02,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:02,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705706420] [2021-07-13 19:57:02,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705706420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:02,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594161658] [2021-07-13 19:57:02,425 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:02,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:02,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:02,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:02,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:02,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:02,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:02,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:02,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:02,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 19:57:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:02,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594161658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:02,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:02,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 19:57:02,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40254316] [2021-07-13 19:57:02,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:02,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:02,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:02,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:02,671 INFO L87 Difference]: Start difference. First operand 1074 states and 2561 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:04,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:04,085 INFO L93 Difference]: Finished difference Result 2272 states and 5540 transitions. [2021-07-13 19:57:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:57:04,085 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:04,088 INFO L225 Difference]: With dead ends: 2272 [2021-07-13 19:57:04,088 INFO L226 Difference]: Without dead ends: 2252 [2021-07-13 19:57:04,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1038.1ms TimeCoverageRelationStatistics Valid=305, Invalid=1587, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:57:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-07-13 19:57:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1071. [2021-07-13 19:57:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 2.3869158878504675) internal successors, (2554), 1070 states have internal predecessors, (2554), 0 states have call successors, (0), 0 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 19:57:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 2554 transitions. [2021-07-13 19:57:04,101 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 2554 transitions. Word has length 30 [2021-07-13 19:57:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:04,101 INFO L482 AbstractCegarLoop]: Abstraction has 1071 states and 2554 transitions. [2021-07-13 19:57:04,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 2554 transitions. [2021-07-13 19:57:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:04,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:04,103 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] [2021-07-13 19:57:04,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-07-13 19:57:04,303 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:04,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1904012123, now seen corresponding path program 36 times [2021-07-13 19:57:04,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:04,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755383194] [2021-07-13 19:57:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:04,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:04,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755383194] [2021-07-13 19:57:04,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755383194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:04,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589089100] [2021-07-13 19:57:04,563 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:04,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:57:04,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:04,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:04,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:04,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:04,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:04,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:04,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:04,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:57:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:04,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589089100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:04,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:04,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 19:57:04,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44443704] [2021-07-13 19:57:04,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:04,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:04,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:04,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:04,853 INFO L87 Difference]: Start difference. First operand 1071 states and 2554 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:06,462 INFO L93 Difference]: Finished difference Result 2334 states and 5687 transitions. [2021-07-13 19:57:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:57:06,462 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:06,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:06,465 INFO L225 Difference]: With dead ends: 2334 [2021-07-13 19:57:06,465 INFO L226 Difference]: Without dead ends: 2297 [2021-07-13 19:57:06,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1172.8ms TimeCoverageRelationStatistics Valid=321, Invalid=1659, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:57:06,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-07-13 19:57:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1061. [2021-07-13 19:57:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 2.3867924528301887) internal successors, (2530), 1060 states have internal predecessors, (2530), 0 states have call successors, (0), 0 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 19:57:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 2530 transitions. [2021-07-13 19:57:06,479 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 2530 transitions. Word has length 30 [2021-07-13 19:57:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:06,479 INFO L482 AbstractCegarLoop]: Abstraction has 1061 states and 2530 transitions. [2021-07-13 19:57:06,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 2530 transitions. [2021-07-13 19:57:06,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:06,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:06,480 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] [2021-07-13 19:57:06,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable432,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:06,680 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:06,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1662047545, now seen corresponding path program 37 times [2021-07-13 19:57:06,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:06,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965326999] [2021-07-13 19:57:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:06,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:06,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965326999] [2021-07-13 19:57:06,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965326999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:06,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55873812] [2021-07-13 19:57:06,884 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:06,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:06,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:07,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:07,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:07,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:07,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:07,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:57:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:07,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55873812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:07,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:07,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 19:57:07,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939314728] [2021-07-13 19:57:07,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:07,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:07,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:07,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:07,133 INFO L87 Difference]: Start difference. First operand 1061 states and 2530 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:08,537 INFO L93 Difference]: Finished difference Result 2766 states and 6797 transitions. [2021-07-13 19:57:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:57:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:08,541 INFO L225 Difference]: With dead ends: 2766 [2021-07-13 19:57:08,541 INFO L226 Difference]: Without dead ends: 2755 [2021-07-13 19:57:08,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1122.4ms TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:57:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-07-13 19:57:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1100. [2021-07-13 19:57:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 2.393994540491356) internal successors, (2631), 1099 states have internal predecessors, (2631), 0 states have call successors, (0), 0 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 19:57:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 2631 transitions. [2021-07-13 19:57:08,558 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 2631 transitions. Word has length 30 [2021-07-13 19:57:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:08,558 INFO L482 AbstractCegarLoop]: Abstraction has 1100 states and 2631 transitions. [2021-07-13 19:57:08,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 2631 transitions. [2021-07-13 19:57:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:08,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:08,559 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] [2021-07-13 19:57:08,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-13 19:57:08,759 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:08,760 INFO L82 PathProgramCache]: Analyzing trace with hash 94353505, now seen corresponding path program 38 times [2021-07-13 19:57:08,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:08,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448350826] [2021-07-13 19:57:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:08,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:08,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448350826] [2021-07-13 19:57:08,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448350826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:08,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123393177] [2021-07-13 19:57:08,961 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:08,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:08,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:08,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:57:08,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:09,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:09,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 19:57:09,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:09,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:09,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:09,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-07-13 19:57:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:09,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123393177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:09,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:09,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-07-13 19:57:09,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132197064] [2021-07-13 19:57:09,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:57:09,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:09,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:57:09,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:57:09,360 INFO L87 Difference]: Start difference. First operand 1100 states and 2631 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:10,849 INFO L93 Difference]: Finished difference Result 2688 states and 6628 transitions. [2021-07-13 19:57:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:57:10,849 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:10,853 INFO L225 Difference]: With dead ends: 2688 [2021-07-13 19:57:10,853 INFO L226 Difference]: Without dead ends: 2676 [2021-07-13 19:57:10,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1172.3ms TimeCoverageRelationStatistics Valid=400, Invalid=1856, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:57:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-07-13 19:57:10,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1082. [2021-07-13 19:57:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1081 states have (on average 2.3922294172062903) internal successors, (2586), 1081 states have internal predecessors, (2586), 0 states have call successors, (0), 0 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 19:57:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 2586 transitions. [2021-07-13 19:57:10,876 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 2586 transitions. Word has length 30 [2021-07-13 19:57:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:10,876 INFO L482 AbstractCegarLoop]: Abstraction has 1082 states and 2586 transitions. [2021-07-13 19:57:10,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 2586 transitions. [2021-07-13 19:57:10,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:10,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:10,878 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] [2021-07-13 19:57:11,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:11,078 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash -823596685, now seen corresponding path program 39 times [2021-07-13 19:57:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:11,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643233909] [2021-07-13 19:57:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:11,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:11,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643233909] [2021-07-13 19:57:11,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643233909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:11,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488552850] [2021-07-13 19:57:11,284 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:11,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:57:11,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:11,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:11,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:11,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:57:11,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:11,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:11,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:11,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-07-13 19:57:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:11,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488552850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:11,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:11,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 19:57:11,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603478899] [2021-07-13 19:57:11,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:11,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:11,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:11,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:11,524 INFO L87 Difference]: Start difference. First operand 1082 states and 2586 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:13,318 INFO L93 Difference]: Finished difference Result 3106 states and 7623 transitions. [2021-07-13 19:57:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:57:13,318 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:13,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:13,322 INFO L225 Difference]: With dead ends: 3106 [2021-07-13 19:57:13,322 INFO L226 Difference]: Without dead ends: 3088 [2021-07-13 19:57:13,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1509.9ms TimeCoverageRelationStatistics Valid=648, Invalid=2774, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:57:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-07-13 19:57:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 1084. [2021-07-13 19:57:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.389658356417359) internal successors, (2588), 1083 states have internal predecessors, (2588), 0 states have call successors, (0), 0 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 19:57:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2588 transitions. [2021-07-13 19:57:13,339 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2588 transitions. Word has length 30 [2021-07-13 19:57:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:13,339 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 2588 transitions. [2021-07-13 19:57:13,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:13,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2588 transitions. [2021-07-13 19:57:13,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:13,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:13,341 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] [2021-07-13 19:57:13,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-07-13 19:57:13,541 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:13,541 INFO L82 PathProgramCache]: Analyzing trace with hash 629797713, now seen corresponding path program 40 times [2021-07-13 19:57:13,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:13,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971263669] [2021-07-13 19:57:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:13,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:13,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971263669] [2021-07-13 19:57:13,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971263669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:13,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430097540] [2021-07-13 19:57:13,750 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:13,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:13,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:13,771 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:13,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:13,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:13,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:13,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:13,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:13,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 19:57:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:13,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430097540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:13,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:13,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 19:57:13,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978663702] [2021-07-13 19:57:13,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:13,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:13,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:13,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:13,999 INFO L87 Difference]: Start difference. First operand 1084 states and 2588 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:15,289 INFO L93 Difference]: Finished difference Result 2454 states and 5955 transitions. [2021-07-13 19:57:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:57:15,289 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:15,292 INFO L225 Difference]: With dead ends: 2454 [2021-07-13 19:57:15,293 INFO L226 Difference]: Without dead ends: 2434 [2021-07-13 19:57:15,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 923.1ms TimeCoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:57:15,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-07-13 19:57:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1079. [2021-07-13 19:57:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 2.3896103896103895) internal successors, (2576), 1078 states have internal predecessors, (2576), 0 states have call successors, (0), 0 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 19:57:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 2576 transitions. [2021-07-13 19:57:15,307 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 2576 transitions. Word has length 30 [2021-07-13 19:57:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:15,308 INFO L482 AbstractCegarLoop]: Abstraction has 1079 states and 2576 transitions. [2021-07-13 19:57:15,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:15,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 2576 transitions. [2021-07-13 19:57:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:15,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:15,309 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] [2021-07-13 19:57:15,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:15,509 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:15,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:15,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1007774743, now seen corresponding path program 41 times [2021-07-13 19:57:15,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:15,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035733454] [2021-07-13 19:57:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:15,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:15,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035733454] [2021-07-13 19:57:15,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035733454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:15,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954231281] [2021-07-13 19:57:15,767 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:15,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:15,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:15,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:15,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:15,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:15,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:15,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:15,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:15,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:57:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:16,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954231281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:16,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:16,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 19:57:16,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037466959] [2021-07-13 19:57:16,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:16,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:16,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:16,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:16,008 INFO L87 Difference]: Start difference. First operand 1079 states and 2576 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:17,417 INFO L93 Difference]: Finished difference Result 2616 states and 6343 transitions. [2021-07-13 19:57:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:57:17,417 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:17,421 INFO L225 Difference]: With dead ends: 2616 [2021-07-13 19:57:17,421 INFO L226 Difference]: Without dead ends: 2579 [2021-07-13 19:57:17,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1008.8ms TimeCoverageRelationStatistics Valid=344, Invalid=1636, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:57:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2021-07-13 19:57:17,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 1064. [2021-07-13 19:57:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 2.3866415804327374) internal successors, (2537), 1063 states have internal predecessors, (2537), 0 states have call successors, (0), 0 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 19:57:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 2537 transitions. [2021-07-13 19:57:17,437 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 2537 transitions. Word has length 30 [2021-07-13 19:57:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:17,438 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 2537 transitions. [2021-07-13 19:57:17,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 2537 transitions. [2021-07-13 19:57:17,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:17,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:17,439 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] [2021-07-13 19:57:17,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:17,639 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:17,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:17,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1653788199, now seen corresponding path program 42 times [2021-07-13 19:57:17,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:17,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044128789] [2021-07-13 19:57:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:17,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:17,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044128789] [2021-07-13 19:57:17,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044128789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:17,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491529084] [2021-07-13 19:57:17,847 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:17,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:57:17,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:17,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:17,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:18,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:18,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:18,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:18,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:18,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 19:57:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:18,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491529084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:18,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:18,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 19:57:18,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620099374] [2021-07-13 19:57:18,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:18,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:18,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:18,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:18,133 INFO L87 Difference]: Start difference. First operand 1064 states and 2537 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:19,080 INFO L93 Difference]: Finished difference Result 2343 states and 5697 transitions. [2021-07-13 19:57:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:57:19,080 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:19,083 INFO L225 Difference]: With dead ends: 2343 [2021-07-13 19:57:19,083 INFO L226 Difference]: Without dead ends: 2333 [2021-07-13 19:57:19,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 671.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:57:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-07-13 19:57:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1061. [2021-07-13 19:57:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 2.3867924528301887) internal successors, (2530), 1060 states have internal predecessors, (2530), 0 states have call successors, (0), 0 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 19:57:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 2530 transitions. [2021-07-13 19:57:19,097 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 2530 transitions. Word has length 30 [2021-07-13 19:57:19,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:19,097 INFO L482 AbstractCegarLoop]: Abstraction has 1061 states and 2530 transitions. [2021-07-13 19:57:19,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 2530 transitions. [2021-07-13 19:57:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:19,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:19,098 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] [2021-07-13 19:57:19,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-07-13 19:57:19,299 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash 389195863, now seen corresponding path program 46 times [2021-07-13 19:57:19,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:19,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938842003] [2021-07-13 19:57:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:19,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:19,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938842003] [2021-07-13 19:57:19,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938842003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:19,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554267691] [2021-07-13 19:57:19,537 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:19,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:19,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:19,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:19,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:19,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:19,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:19,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:19,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:19,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:57:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:19,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554267691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:19,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:19,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-07-13 19:57:19,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617148374] [2021-07-13 19:57:19,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:19,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:19,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:19,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:19,754 INFO L87 Difference]: Start difference. First operand 1061 states and 2530 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:21,401 INFO L93 Difference]: Finished difference Result 2474 states and 6065 transitions. [2021-07-13 19:57:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:57:21,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 30 [2021-07-13 19:57:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:21,404 INFO L225 Difference]: With dead ends: 2474 [2021-07-13 19:57:21,404 INFO L226 Difference]: Without dead ends: 2465 [2021-07-13 19:57:21,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1028.0ms TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:57:21,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-07-13 19:57:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1074. [2021-07-13 19:57:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.3886300093196646) internal successors, (2563), 1073 states have internal predecessors, (2563), 0 states have call successors, (0), 0 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 19:57:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2563 transitions. [2021-07-13 19:57:21,421 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2563 transitions. Word has length 30 [2021-07-13 19:57:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:21,421 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 2563 transitions. [2021-07-13 19:57:21,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2563 transitions. [2021-07-13 19:57:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:21,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:21,422 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] [2021-07-13 19:57:21,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:21,623 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:21,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:21,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1964971863, now seen corresponding path program 47 times [2021-07-13 19:57:21,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:21,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133345477] [2021-07-13 19:57:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:21,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:21,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133345477] [2021-07-13 19:57:21,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133345477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:21,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715246072] [2021-07-13 19:57:21,850 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:21,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:57:21,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:21,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:57:21,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:22,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:22,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:22,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:57:22,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:22,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:22,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:22,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:11 [2021-07-13 19:57:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:22,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715246072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:22,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:22,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:57:22,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221979714] [2021-07-13 19:57:22,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:57:22,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:22,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:57:22,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:57:22,195 INFO L87 Difference]: Start difference. First operand 1074 states and 2563 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:57:23,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:23,839 INFO L93 Difference]: Finished difference Result 2339 states and 5745 transitions. [2021-07-13 19:57:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:57:23,840 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:57:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:23,844 INFO L225 Difference]: With dead ends: 2339 [2021-07-13 19:57:23,844 INFO L226 Difference]: Without dead ends: 2330 [2021-07-13 19:57:23,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1364.0ms TimeCoverageRelationStatistics Valid=356, Invalid=2194, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:57:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-07-13 19:57:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1101. [2021-07-13 19:57:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 2.3945454545454545) internal successors, (2634), 1100 states have internal predecessors, (2634), 0 states have call successors, (0), 0 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 19:57:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 2634 transitions. [2021-07-13 19:57:23,872 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 2634 transitions. Word has length 30 [2021-07-13 19:57:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:23,872 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 2634 transitions. [2021-07-13 19:57:23,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:57:23,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 2634 transitions. [2021-07-13 19:57:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:23,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:23,874 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] [2021-07-13 19:57:24,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-13 19:57:24,089 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:24,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1830170455, now seen corresponding path program 48 times [2021-07-13 19:57:24,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:24,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551848137] [2021-07-13 19:57:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:24,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:24,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551848137] [2021-07-13 19:57:24,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551848137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:24,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107894432] [2021-07-13 19:57:24,324 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:24,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:57:24,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:24,347 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:24,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:24,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:24,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:24,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:24,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:24,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:57:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:24,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107894432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:24,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:24,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:57:24,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64940360] [2021-07-13 19:57:24,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:57:24,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:24,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:57:24,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:57:24,520 INFO L87 Difference]: Start difference. First operand 1101 states and 2634 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:26,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:26,075 INFO L93 Difference]: Finished difference Result 2675 states and 6595 transitions. [2021-07-13 19:57:26,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:57:26,075 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:26,078 INFO L225 Difference]: With dead ends: 2675 [2021-07-13 19:57:26,078 INFO L226 Difference]: Without dead ends: 2658 [2021-07-13 19:57:26,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1249.5ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:57:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-07-13 19:57:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 1137. [2021-07-13 19:57:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.398767605633803) internal successors, (2725), 1136 states have internal predecessors, (2725), 0 states have call successors, (0), 0 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 19:57:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2725 transitions. [2021-07-13 19:57:26,095 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2725 transitions. Word has length 30 [2021-07-13 19:57:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:26,095 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 2725 transitions. [2021-07-13 19:57:26,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2725 transitions. [2021-07-13 19:57:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:26,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:26,097 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] [2021-07-13 19:57:26,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:26,298 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:26,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:26,298 INFO L82 PathProgramCache]: Analyzing trace with hash -666538955, now seen corresponding path program 49 times [2021-07-13 19:57:26,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:26,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055576286] [2021-07-13 19:57:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:26,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:26,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055576286] [2021-07-13 19:57:26,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055576286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:26,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104161708] [2021-07-13 19:57:26,571 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:26,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:26,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:26,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:26,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:26,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:26,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:26,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:57:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:26,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104161708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:26,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:26,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-07-13 19:57:26,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898189067] [2021-07-13 19:57:26,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:26,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:26,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:26,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:26,839 INFO L87 Difference]: Start difference. First operand 1137 states and 2725 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 19:57:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:28,523 INFO L93 Difference]: Finished difference Result 2516 states and 6175 transitions. [2021-07-13 19:57:28,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:57:28,524 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 30 [2021-07-13 19:57:28,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:28,527 INFO L225 Difference]: With dead ends: 2516 [2021-07-13 19:57:28,527 INFO L226 Difference]: Without dead ends: 2507 [2021-07-13 19:57:28,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1161.6ms TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:57:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-07-13 19:57:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1136. [2021-07-13 19:57:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.3982378854625552) internal successors, (2722), 1135 states have internal predecessors, (2722), 0 states have call successors, (0), 0 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 19:57:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 2722 transitions. [2021-07-13 19:57:28,543 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 2722 transitions. Word has length 30 [2021-07-13 19:57:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:28,543 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 2722 transitions. [2021-07-13 19:57:28,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 19:57:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 2722 transitions. [2021-07-13 19:57:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:28,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:28,544 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] [2021-07-13 19:57:28,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:28,744 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1866043749, now seen corresponding path program 50 times [2021-07-13 19:57:28,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:28,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267592572] [2021-07-13 19:57:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:28,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:28,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267592572] [2021-07-13 19:57:28,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267592572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:28,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614166259] [2021-07-13 19:57:28,992 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:29,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:29,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:29,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:29,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:29,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:29,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:29,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:29,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:29,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:57:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:29,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614166259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:29,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:29,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:57:29,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813542397] [2021-07-13 19:57:29,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:57:29,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:29,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:57:29,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:57:29,198 INFO L87 Difference]: Start difference. First operand 1136 states and 2722 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 19:57:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:31,358 INFO L93 Difference]: Finished difference Result 2847 states and 7028 transitions. [2021-07-13 19:57:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:57:31,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 30 [2021-07-13 19:57:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:31,362 INFO L225 Difference]: With dead ends: 2847 [2021-07-13 19:57:31,362 INFO L226 Difference]: Without dead ends: 2832 [2021-07-13 19:57:31,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1793.0ms TimeCoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:57:31,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-07-13 19:57:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1115. [2021-07-13 19:57:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.3922800718132855) internal successors, (2665), 1114 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 19:57:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2665 transitions. [2021-07-13 19:57:31,379 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2665 transitions. Word has length 30 [2021-07-13 19:57:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:31,379 INFO L482 AbstractCegarLoop]: Abstraction has 1115 states and 2665 transitions. [2021-07-13 19:57:31,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 19:57:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2665 transitions. [2021-07-13 19:57:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:31,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:31,380 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] [2021-07-13 19:57:31,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-07-13 19:57:31,580 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 331204883, now seen corresponding path program 51 times [2021-07-13 19:57:31,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:31,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396233171] [2021-07-13 19:57:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:31,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:31,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396233171] [2021-07-13 19:57:31,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396233171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:31,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150979774] [2021-07-13 19:57:31,898 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:31,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:57:31,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:31,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:57:31,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:32,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:32,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 19:57:32,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:57:32,186 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.8 percent of original size [2021-07-13 19:57:32,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:32,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:59 [2021-07-13 19:57:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:32,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150979774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:32,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:32,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2021-07-13 19:57:32,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308414382] [2021-07-13 19:57:32,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:57:32,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:32,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:57:32,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:57:32,406 INFO L87 Difference]: Start difference. First operand 1115 states and 2665 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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 19:57:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:34,270 INFO L93 Difference]: Finished difference Result 2597 states and 6364 transitions. [2021-07-13 19:57:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:57:34,271 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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 30 [2021-07-13 19:57:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:34,274 INFO L225 Difference]: With dead ends: 2597 [2021-07-13 19:57:34,274 INFO L226 Difference]: Without dead ends: 2586 [2021-07-13 19:57:34,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1691.1ms TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:57:34,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-07-13 19:57:34,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 1169. [2021-07-13 19:57:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 2.405821917808219) internal successors, (2810), 1168 states have internal predecessors, (2810), 0 states have call successors, (0), 0 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 19:57:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 2810 transitions. [2021-07-13 19:57:34,290 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 2810 transitions. Word has length 30 [2021-07-13 19:57:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:34,290 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 2810 transitions. [2021-07-13 19:57:34,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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 19:57:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 2810 transitions. [2021-07-13 19:57:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:34,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:34,291 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] [2021-07-13 19:57:34,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:34,491 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:34,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:34,492 INFO L82 PathProgramCache]: Analyzing trace with hash 2087605933, now seen corresponding path program 52 times [2021-07-13 19:57:34,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:34,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803691595] [2021-07-13 19:57:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:34,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:34,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803691595] [2021-07-13 19:57:34,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803691595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:34,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764148373] [2021-07-13 19:57:34,766 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:34,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:34,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:34,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:34,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:34,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:34,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:34,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:34,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:34,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:57:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:34,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764148373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:34,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:34,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:57:34,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437357197] [2021-07-13 19:57:34,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:34,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:34,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:34,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:34,950 INFO L87 Difference]: Start difference. First operand 1169 states and 2810 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:36,139 INFO L93 Difference]: Finished difference Result 2753 states and 6801 transitions. [2021-07-13 19:57:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:57:36,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 30 [2021-07-13 19:57:36,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:36,143 INFO L225 Difference]: With dead ends: 2753 [2021-07-13 19:57:36,143 INFO L226 Difference]: Without dead ends: 2733 [2021-07-13 19:57:36,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1011.1ms TimeCoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:57:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-07-13 19:57:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 1184. [2021-07-13 19:57:36,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.407438715131023) internal successors, (2848), 1183 states have internal predecessors, (2848), 0 states have call successors, (0), 0 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 19:57:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2848 transitions. [2021-07-13 19:57:36,161 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2848 transitions. Word has length 30 [2021-07-13 19:57:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:36,161 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 2848 transitions. [2021-07-13 19:57:36,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2848 transitions. [2021-07-13 19:57:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:36,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:36,162 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] [2021-07-13 19:57:36,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-07-13 19:57:36,363 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash -678407295, now seen corresponding path program 53 times [2021-07-13 19:57:36,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:36,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869071929] [2021-07-13 19:57:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:36,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:36,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869071929] [2021-07-13 19:57:36,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869071929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:36,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775096056] [2021-07-13 19:57:36,633 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:36,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:57:36,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:36,656 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:36,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:36,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:57:36,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:36,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:36,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:36,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:57:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:36,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775096056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:36,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:36,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:57:36,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576346537] [2021-07-13 19:57:36,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:36,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:36,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:36,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:36,844 INFO L87 Difference]: Start difference. First operand 1184 states and 2848 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 19:57:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:38,146 INFO L93 Difference]: Finished difference Result 2448 states and 5993 transitions. [2021-07-13 19:57:38,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:57:38,146 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 30 [2021-07-13 19:57:38,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:38,150 INFO L225 Difference]: With dead ends: 2448 [2021-07-13 19:57:38,150 INFO L226 Difference]: Without dead ends: 2425 [2021-07-13 19:57:38,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 940.4ms TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:57:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-07-13 19:57:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1175. [2021-07-13 19:57:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 2.4045996592844974) internal successors, (2823), 1174 states have internal predecessors, (2823), 0 states have call successors, (0), 0 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 19:57:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 2823 transitions. [2021-07-13 19:57:38,165 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 2823 transitions. Word has length 30 [2021-07-13 19:57:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:38,165 INFO L482 AbstractCegarLoop]: Abstraction has 1175 states and 2823 transitions. [2021-07-13 19:57:38,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 19:57:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 2823 transitions. [2021-07-13 19:57:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:38,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:38,166 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] [2021-07-13 19:57:38,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:38,367 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:38,367 INFO L82 PathProgramCache]: Analyzing trace with hash 395838389, now seen corresponding path program 54 times [2021-07-13 19:57:38,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:38,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098801982] [2021-07-13 19:57:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:38,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:38,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098801982] [2021-07-13 19:57:38,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098801982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:38,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347568246] [2021-07-13 19:57:38,656 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:38,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:57:38,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:38,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:38,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:38,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:38,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:38,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:38,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:38,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:57:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:38,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347568246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:38,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:38,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:57:38,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761031219] [2021-07-13 19:57:38,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:38,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:38,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:38,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:38,843 INFO L87 Difference]: Start difference. First operand 1175 states and 2823 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:40,022 INFO L93 Difference]: Finished difference Result 2620 states and 6436 transitions. [2021-07-13 19:57:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:57:40,023 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 30 [2021-07-13 19:57:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:40,026 INFO L225 Difference]: With dead ends: 2620 [2021-07-13 19:57:40,026 INFO L226 Difference]: Without dead ends: 2609 [2021-07-13 19:57:40,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 963.9ms TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:57:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-07-13 19:57:40,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1184. [2021-07-13 19:57:40,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.404057480980558) internal successors, (2844), 1183 states have internal predecessors, (2844), 0 states have call successors, (0), 0 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 19:57:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2844 transitions. [2021-07-13 19:57:40,042 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2844 transitions. Word has length 30 [2021-07-13 19:57:40,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:40,042 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 2844 transitions. [2021-07-13 19:57:40,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2844 transitions. [2021-07-13 19:57:40,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:40,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:40,043 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] [2021-07-13 19:57:40,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-07-13 19:57:40,244 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:40,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2142727857, now seen corresponding path program 55 times [2021-07-13 19:57:40,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:40,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544470646] [2021-07-13 19:57:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:40,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:40,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544470646] [2021-07-13 19:57:40,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544470646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:40,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089738552] [2021-07-13 19:57:40,532 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:40,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:40,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:40,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:40,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:40,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:40,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:40,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:57:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:40,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089738552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:40,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:40,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:57:40,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487350696] [2021-07-13 19:57:40,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:40,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:40,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:40,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:40,717 INFO L87 Difference]: Start difference. First operand 1184 states and 2844 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:41,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:41,893 INFO L93 Difference]: Finished difference Result 2750 states and 6780 transitions. [2021-07-13 19:57:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:57:41,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 30 [2021-07-13 19:57:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:41,897 INFO L225 Difference]: With dead ends: 2750 [2021-07-13 19:57:41,897 INFO L226 Difference]: Without dead ends: 2730 [2021-07-13 19:57:41,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1013.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:57:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-07-13 19:57:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 1177. [2021-07-13 19:57:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 2.4047619047619047) internal successors, (2828), 1176 states have internal predecessors, (2828), 0 states have call successors, (0), 0 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 19:57:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2828 transitions. [2021-07-13 19:57:41,913 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2828 transitions. Word has length 30 [2021-07-13 19:57:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:41,913 INFO L482 AbstractCegarLoop]: Abstraction has 1177 states and 2828 transitions. [2021-07-13 19:57:41,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2828 transitions. [2021-07-13 19:57:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:41,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:41,914 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] [2021-07-13 19:57:42,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-07-13 19:57:42,115 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:42,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:42,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1228747365, now seen corresponding path program 56 times [2021-07-13 19:57:42,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:42,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555188366] [2021-07-13 19:57:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:42,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:42,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555188366] [2021-07-13 19:57:42,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555188366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:42,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804694694] [2021-07-13 19:57:42,366 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:42,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:42,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:42,388 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:42,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:42,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:42,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:42,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:42,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:57:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:42,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804694694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:42,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:42,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-07-13 19:57:42,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397945139] [2021-07-13 19:57:42,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:42,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:42,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:42,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:42,582 INFO L87 Difference]: Start difference. First operand 1177 states and 2828 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 19:57:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:44,152 INFO L93 Difference]: Finished difference Result 2552 states and 6267 transitions. [2021-07-13 19:57:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:57:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 30 [2021-07-13 19:57:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:44,156 INFO L225 Difference]: With dead ends: 2552 [2021-07-13 19:57:44,156 INFO L226 Difference]: Without dead ends: 2543 [2021-07-13 19:57:44,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 997.1ms TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:57:44,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-07-13 19:57:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 1169. [2021-07-13 19:57:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 2.4049657534246576) internal successors, (2809), 1168 states have internal predecessors, (2809), 0 states have call successors, (0), 0 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 19:57:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 2809 transitions. [2021-07-13 19:57:44,174 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 2809 transitions. Word has length 30 [2021-07-13 19:57:44,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:44,174 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 2809 transitions. [2021-07-13 19:57:44,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 19:57:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 2809 transitions. [2021-07-13 19:57:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:44,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:44,175 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] [2021-07-13 19:57:44,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable459,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:44,376 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:44,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:44,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2075383707, now seen corresponding path program 57 times [2021-07-13 19:57:44,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:44,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435940502] [2021-07-13 19:57:44,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:44,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:44,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435940502] [2021-07-13 19:57:44,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435940502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:44,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359915176] [2021-07-13 19:57:44,586 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:44,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:57:44,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:44,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:44,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:44,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:44,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:44,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:44,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:44,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:17 [2021-07-13 19:57:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:44,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359915176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:44,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:44,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 21 [2021-07-13 19:57:44,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632817779] [2021-07-13 19:57:44,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:44,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:44,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:44,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:44,795 INFO L87 Difference]: Start difference. First operand 1169 states and 2809 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 19:57:45,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:45,782 INFO L93 Difference]: Finished difference Result 2757 states and 6775 transitions. [2021-07-13 19:57:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:57:45,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 30 [2021-07-13 19:57:45,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:45,785 INFO L225 Difference]: With dead ends: 2757 [2021-07-13 19:57:45,785 INFO L226 Difference]: Without dead ends: 2746 [2021-07-13 19:57:45,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 797.4ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:57:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-07-13 19:57:45,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1194. [2021-07-13 19:57:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 2.40989103101425) internal successors, (2875), 1193 states have internal predecessors, (2875), 0 states have call successors, (0), 0 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 19:57:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 2875 transitions. [2021-07-13 19:57:45,802 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 2875 transitions. Word has length 30 [2021-07-13 19:57:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:45,802 INFO L482 AbstractCegarLoop]: Abstraction has 1194 states and 2875 transitions. [2021-07-13 19:57:45,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 19:57:45,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 2875 transitions. [2021-07-13 19:57:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:45,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:45,803 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] [2021-07-13 19:57:46,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:46,004 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:46,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:46,004 INFO L82 PathProgramCache]: Analyzing trace with hash -318982657, now seen corresponding path program 58 times [2021-07-13 19:57:46,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:46,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481161222] [2021-07-13 19:57:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:46,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:46,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481161222] [2021-07-13 19:57:46,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481161222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:46,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300663169] [2021-07-13 19:57:46,217 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:46,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:46,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:46,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:46,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:46,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:46,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:46,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:46,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:46,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:57:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:46,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300663169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:46,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:46,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:57:46,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5107703] [2021-07-13 19:57:46,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:46,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:46,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:46,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:46,403 INFO L87 Difference]: Start difference. First operand 1194 states and 2875 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:47,355 INFO L93 Difference]: Finished difference Result 2857 states and 7040 transitions. [2021-07-13 19:57:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:57:47,355 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 30 [2021-07-13 19:57:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:47,359 INFO L225 Difference]: With dead ends: 2857 [2021-07-13 19:57:47,359 INFO L226 Difference]: Without dead ends: 2837 [2021-07-13 19:57:47,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:57:47,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2837 states. [2021-07-13 19:57:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2837 to 1188. [2021-07-13 19:57:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 2.4077506318449875) internal successors, (2858), 1187 states have internal predecessors, (2858), 0 states have call successors, (0), 0 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 19:57:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 2858 transitions. [2021-07-13 19:57:47,376 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 2858 transitions. Word has length 30 [2021-07-13 19:57:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:47,376 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 2858 transitions. [2021-07-13 19:57:47,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 2858 transitions. [2021-07-13 19:57:47,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:47,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:47,377 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] [2021-07-13 19:57:47,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:47,578 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:47,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1890322569, now seen corresponding path program 59 times [2021-07-13 19:57:47,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:47,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444732527] [2021-07-13 19:57:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:47,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:47,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444732527] [2021-07-13 19:57:47,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444732527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:47,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938955799] [2021-07-13 19:57:47,807 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:47,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:47,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:47,830 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:47,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:57:47,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:48,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:48,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:48,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:57:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:48,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938955799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:48,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:48,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:57:48,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716326948] [2021-07-13 19:57:48,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:48,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:48,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:48,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:48,024 INFO L87 Difference]: Start difference. First operand 1188 states and 2858 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 19:57:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:49,041 INFO L93 Difference]: Finished difference Result 2628 states and 6407 transitions. [2021-07-13 19:57:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:57:49,042 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 30 [2021-07-13 19:57:49,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:49,045 INFO L225 Difference]: With dead ends: 2628 [2021-07-13 19:57:49,045 INFO L226 Difference]: Without dead ends: 2605 [2021-07-13 19:57:49,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 821.0ms TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:57:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-07-13 19:57:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1173. [2021-07-13 19:57:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.4044368600682593) internal successors, (2818), 1172 states have internal predecessors, (2818), 0 states have call successors, (0), 0 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 19:57:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 2818 transitions. [2021-07-13 19:57:49,060 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 2818 transitions. Word has length 30 [2021-07-13 19:57:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:49,060 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 2818 transitions. [2021-07-13 19:57:49,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 19:57:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 2818 transitions. [2021-07-13 19:57:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:49,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:49,062 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] [2021-07-13 19:57:49,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:49,262 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:49,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1091399703, now seen corresponding path program 60 times [2021-07-13 19:57:49,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:49,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496422697] [2021-07-13 19:57:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:49,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:49,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496422697] [2021-07-13 19:57:49,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496422697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:49,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788795663] [2021-07-13 19:57:49,478 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:49,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:57:49,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:49,501 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:57:49,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:49,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:49,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 19:57:49,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:49,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:49,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:49,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-07-13 19:57:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:49,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788795663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:49,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:49,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-07-13 19:57:49,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410659323] [2021-07-13 19:57:49,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:57:49,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:49,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:57:49,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:57:49,832 INFO L87 Difference]: Start difference. First operand 1173 states and 2818 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 19:57:50,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:50,658 INFO L93 Difference]: Finished difference Result 2580 states and 6316 transitions. [2021-07-13 19:57:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:57:50,659 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 30 [2021-07-13 19:57:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:50,662 INFO L225 Difference]: With dead ends: 2580 [2021-07-13 19:57:50,662 INFO L226 Difference]: Without dead ends: 2570 [2021-07-13 19:57:50,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 711.2ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:57:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-07-13 19:57:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1170. [2021-07-13 19:57:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.4046193327630454) internal successors, (2811), 1169 states have internal predecessors, (2811), 0 states have call successors, (0), 0 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 19:57:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2811 transitions. [2021-07-13 19:57:50,677 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2811 transitions. Word has length 30 [2021-07-13 19:57:50,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:50,677 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 2811 transitions. [2021-07-13 19:57:50,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 19:57:50,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2811 transitions. [2021-07-13 19:57:50,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:50,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:50,679 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] [2021-07-13 19:57:50,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:50,879 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:50,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1904321965, now seen corresponding path program 61 times [2021-07-13 19:57:50,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:50,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7678704] [2021-07-13 19:57:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:51,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:51,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7678704] [2021-07-13 19:57:51,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7678704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:51,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506032422] [2021-07-13 19:57:51,124 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:51,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:51,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:51,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:51,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:51,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:51,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:51,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:57:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:51,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506032422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:51,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:51,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:57:51,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57290753] [2021-07-13 19:57:51,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:51,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:51,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:51,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:51,305 INFO L87 Difference]: Start difference. First operand 1170 states and 2811 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:52,494 INFO L93 Difference]: Finished difference Result 2650 states and 6511 transitions. [2021-07-13 19:57:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:57:52,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 30 [2021-07-13 19:57:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:52,498 INFO L225 Difference]: With dead ends: 2650 [2021-07-13 19:57:52,498 INFO L226 Difference]: Without dead ends: 2639 [2021-07-13 19:57:52,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 916.4ms TimeCoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:57:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2021-07-13 19:57:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 1188. [2021-07-13 19:57:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 2.4060657118786857) internal successors, (2856), 1187 states have internal predecessors, (2856), 0 states have call successors, (0), 0 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 19:57:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 2856 transitions. [2021-07-13 19:57:52,515 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 2856 transitions. Word has length 30 [2021-07-13 19:57:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:52,515 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 2856 transitions. [2021-07-13 19:57:52,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:57:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 2856 transitions. [2021-07-13 19:57:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:52,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:52,522 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] [2021-07-13 19:57:52,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-13 19:57:52,723 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash -634244281, now seen corresponding path program 62 times [2021-07-13 19:57:52,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:52,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441711727] [2021-07-13 19:57:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:52,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:52,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441711727] [2021-07-13 19:57:52,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441711727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:52,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453439992] [2021-07-13 19:57:52,968 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:52,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:52,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:52,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:57:52,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:53,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:53,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 19:57:53,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:57:53,311 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.3 percent of original size [2021-07-13 19:57:53,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:53,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-07-13 19:57:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:53,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453439992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:53,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:53,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:57:53,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552812668] [2021-07-13 19:57:53,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:57:53,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:53,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:57:53,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:57:53,413 INFO L87 Difference]: Start difference. First operand 1188 states and 2856 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 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 19:57:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:54,640 INFO L93 Difference]: Finished difference Result 2689 states and 6632 transitions. [2021-07-13 19:57:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:57:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 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 30 [2021-07-13 19:57:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:54,643 INFO L225 Difference]: With dead ends: 2689 [2021-07-13 19:57:54,643 INFO L226 Difference]: Without dead ends: 2677 [2021-07-13 19:57:54,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1114.9ms TimeCoverageRelationStatistics Valid=310, Invalid=1330, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:57:54,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-13 19:57:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 1179. [2021-07-13 19:57:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 2.4066213921901527) internal successors, (2835), 1178 states have internal predecessors, (2835), 0 states have call successors, (0), 0 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 19:57:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 2835 transitions. [2021-07-13 19:57:54,658 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 2835 transitions. Word has length 30 [2021-07-13 19:57:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:54,659 INFO L482 AbstractCegarLoop]: Abstraction has 1179 states and 2835 transitions. [2021-07-13 19:57:54,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 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 19:57:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 2835 transitions. [2021-07-13 19:57:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:54,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:54,660 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] [2021-07-13 19:57:54,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:54,860 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1552194471, now seen corresponding path program 63 times [2021-07-13 19:57:54,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:54,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592049139] [2021-07-13 19:57:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:55,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:55,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592049139] [2021-07-13 19:57:55,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592049139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:55,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409451907] [2021-07-13 19:57:55,109 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:55,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:57:55,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:55,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:55,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:55,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:55,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:55,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:55,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:57:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:55,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409451907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:55,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:55,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:57:55,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325289625] [2021-07-13 19:57:55,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:55,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:55,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:55,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:55,314 INFO L87 Difference]: Start difference. First operand 1179 states and 2835 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 19:57:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:56,870 INFO L93 Difference]: Finished difference Result 3008 states and 7399 transitions. [2021-07-13 19:57:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:57:56,870 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 30 [2021-07-13 19:57:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:56,874 INFO L225 Difference]: With dead ends: 3008 [2021-07-13 19:57:56,874 INFO L226 Difference]: Without dead ends: 2986 [2021-07-13 19:57:56,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1243.6ms TimeCoverageRelationStatistics Valid=449, Invalid=1903, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:57:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2021-07-13 19:57:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 1182. [2021-07-13 19:57:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.405588484335309) internal successors, (2841), 1181 states have internal predecessors, (2841), 0 states have call successors, (0), 0 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 19:57:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 2841 transitions. [2021-07-13 19:57:56,891 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 2841 transitions. Word has length 30 [2021-07-13 19:57:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:56,891 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 2841 transitions. [2021-07-13 19:57:56,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 19:57:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 2841 transitions. [2021-07-13 19:57:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:56,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:56,892 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] [2021-07-13 19:57:57,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-07-13 19:57:57,093 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash 894709787, now seen corresponding path program 64 times [2021-07-13 19:57:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:57,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083155145] [2021-07-13 19:57:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:57,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:57,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083155145] [2021-07-13 19:57:57,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083155145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:57,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41818288] [2021-07-13 19:57:57,342 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:57,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:57,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:57,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:57:57,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:57,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:57:57,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:57,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:57,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:57,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-07-13 19:57:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:57,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41818288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:57,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:57,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:57:57,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498487121] [2021-07-13 19:57:57,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:57,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:57,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:57,558 INFO L87 Difference]: Start difference. First operand 1182 states and 2841 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 19:57:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:58,698 INFO L93 Difference]: Finished difference Result 2466 states and 6039 transitions. [2021-07-13 19:57:58,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:57:58,699 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 30 [2021-07-13 19:57:58,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:58,702 INFO L225 Difference]: With dead ends: 2466 [2021-07-13 19:57:58,702 INFO L226 Difference]: Without dead ends: 2443 [2021-07-13 19:57:58,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 862.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:57:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-07-13 19:57:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1173. [2021-07-13 19:57:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.4044368600682593) internal successors, (2818), 1172 states have internal predecessors, (2818), 0 states have call successors, (0), 0 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 19:57:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 2818 transitions. [2021-07-13 19:57:58,717 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 2818 transitions. Word has length 30 [2021-07-13 19:57:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:58,717 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 2818 transitions. [2021-07-13 19:57:58,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 19:57:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 2818 transitions. [2021-07-13 19:57:58,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:58,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:58,718 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] [2021-07-13 19:57:58,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-13 19:57:58,919 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:58,919 INFO L82 PathProgramCache]: Analyzing trace with hash 577864591, now seen corresponding path program 65 times [2021-07-13 19:57:58,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:58,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368952253] [2021-07-13 19:57:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:59,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:59,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368952253] [2021-07-13 19:57:59,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368952253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:59,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93443129] [2021-07-13 19:57:59,182 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:59,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:59,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:59,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:59,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:57:59,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:59,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:59,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:59,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:57:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:59,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93443129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:59,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:59,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:57:59,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415237958] [2021-07-13 19:57:59,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:59,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:59,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:59,372 INFO L87 Difference]: Start difference. First operand 1173 states and 2818 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:58:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:00,633 INFO L93 Difference]: Finished difference Result 2652 states and 6510 transitions. [2021-07-13 19:58:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:58:00,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 30 [2021-07-13 19:58:00,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:00,636 INFO L225 Difference]: With dead ends: 2652 [2021-07-13 19:58:00,636 INFO L226 Difference]: Without dead ends: 2641 [2021-07-13 19:58:00,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1058.3ms TimeCoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:58:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-07-13 19:58:00,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 1182. [2021-07-13 19:58:00,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.4038950042337004) internal successors, (2839), 1181 states have internal predecessors, (2839), 0 states have call successors, (0), 0 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 19:58:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 2839 transitions. [2021-07-13 19:58:00,653 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 2839 transitions. Word has length 30 [2021-07-13 19:58:00,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:00,653 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 2839 transitions. [2021-07-13 19:58:00,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:58:00,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 2839 transitions. [2021-07-13 19:58:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:00,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:00,654 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] [2021-07-13 19:58:00,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:00,855 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:00,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:00,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1960701655, now seen corresponding path program 66 times [2021-07-13 19:58:00,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:00,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153306649] [2021-07-13 19:58:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:01,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153306649] [2021-07-13 19:58:01,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153306649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590444672] [2021-07-13 19:58:01,117 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:01,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:58:01,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:01,140 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:01,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:01,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:01,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:01,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:01,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:01,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:58:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:01,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590444672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:01,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:01,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:58:01,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456644003] [2021-07-13 19:58:01,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:01,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:01,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:01,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:01,304 INFO L87 Difference]: Start difference. First operand 1182 states and 2839 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:58:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:02,546 INFO L93 Difference]: Finished difference Result 2781 states and 6858 transitions. [2021-07-13 19:58:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:58:02,546 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 30 [2021-07-13 19:58:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:02,549 INFO L225 Difference]: With dead ends: 2781 [2021-07-13 19:58:02,549 INFO L226 Difference]: Without dead ends: 2761 [2021-07-13 19:58:02,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1119.2ms TimeCoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:58:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-07-13 19:58:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 1175. [2021-07-13 19:58:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 2.4045996592844974) internal successors, (2823), 1174 states have internal predecessors, (2823), 0 states have call successors, (0), 0 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 19:58:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 2823 transitions. [2021-07-13 19:58:02,567 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 2823 transitions. Word has length 30 [2021-07-13 19:58:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:02,567 INFO L482 AbstractCegarLoop]: Abstraction has 1175 states and 2823 transitions. [2021-07-13 19:58:02,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:58:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 2823 transitions. [2021-07-13 19:58:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:02,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:02,569 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] [2021-07-13 19:58:02,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-07-13 19:58:02,769 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:02,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1046721163, now seen corresponding path program 67 times [2021-07-13 19:58:02,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:02,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924110665] [2021-07-13 19:58:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:02,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:02,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924110665] [2021-07-13 19:58:02,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924110665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:02,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912668491] [2021-07-13 19:58:02,998 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:03,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:03,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:03,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:03,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:03,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:03,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:03,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:58:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:03,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912668491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:03,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:03,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-07-13 19:58:03,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266840476] [2021-07-13 19:58:03,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:03,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:03,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:03,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:03,213 INFO L87 Difference]: Start difference. First operand 1175 states and 2823 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 19:58:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:04,454 INFO L93 Difference]: Finished difference Result 2530 states and 6215 transitions. [2021-07-13 19:58:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:04,455 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 30 [2021-07-13 19:58:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:04,458 INFO L225 Difference]: With dead ends: 2530 [2021-07-13 19:58:04,458 INFO L226 Difference]: Without dead ends: 2521 [2021-07-13 19:58:04,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 900.5ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:58:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-07-13 19:58:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1168. [2021-07-13 19:58:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.405312767780634) internal successors, (2807), 1167 states have internal predecessors, (2807), 0 states have call successors, (0), 0 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 19:58:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2807 transitions. [2021-07-13 19:58:04,473 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2807 transitions. Word has length 30 [2021-07-13 19:58:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:04,473 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2807 transitions. [2021-07-13 19:58:04,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 19:58:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2807 transitions. [2021-07-13 19:58:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:04,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:04,474 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] [2021-07-13 19:58:04,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-07-13 19:58:04,674 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:04,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:04,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1325848085, now seen corresponding path program 68 times [2021-07-13 19:58:04,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:04,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229760259] [2021-07-13 19:58:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:04,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:04,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229760259] [2021-07-13 19:58:04,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229760259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:04,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229688042] [2021-07-13 19:58:04,941 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:04,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:04,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:04,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:05,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:05,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:05,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:05,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:05,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:58:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:05,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229688042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:05,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:05,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:58:05,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114011657] [2021-07-13 19:58:05,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:05,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:05,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:05,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:05,129 INFO L87 Difference]: Start difference. First operand 1168 states and 2807 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:58:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:07,361 INFO L93 Difference]: Finished difference Result 2851 states and 6945 transitions. [2021-07-13 19:58:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:58:07,361 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 30 [2021-07-13 19:58:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:07,365 INFO L225 Difference]: With dead ends: 2851 [2021-07-13 19:58:07,365 INFO L226 Difference]: Without dead ends: 2833 [2021-07-13 19:58:07,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1665.3ms TimeCoverageRelationStatistics Valid=504, Invalid=2466, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:58:07,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-07-13 19:58:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1130. [2021-07-13 19:58:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.3976970770593447) internal successors, (2707), 1129 states have internal predecessors, (2707), 0 states have call successors, (0), 0 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 19:58:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2707 transitions. [2021-07-13 19:58:07,385 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2707 transitions. Word has length 30 [2021-07-13 19:58:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:07,385 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 2707 transitions. [2021-07-13 19:58:07,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:58:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2707 transitions. [2021-07-13 19:58:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:07,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:07,386 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] [2021-07-13 19:58:07,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:07,587 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:07,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:07,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1468185983, now seen corresponding path program 69 times [2021-07-13 19:58:07,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:07,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027056800] [2021-07-13 19:58:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:07,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:07,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027056800] [2021-07-13 19:58:07,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027056800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:07,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303469268] [2021-07-13 19:58:07,845 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:07,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:58:07,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:07,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:07,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:08,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:08,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:08,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:08,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:08,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:58:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:08,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303469268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:08,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:08,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:58:08,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170484324] [2021-07-13 19:58:08,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:58:08,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:08,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:58:08,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:58:08,066 INFO L87 Difference]: Start difference. First operand 1130 states and 2707 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:58:11,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:11,384 INFO L93 Difference]: Finished difference Result 2543 states and 6161 transitions. [2021-07-13 19:58:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 19:58:11,385 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:58:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:11,395 INFO L225 Difference]: With dead ends: 2543 [2021-07-13 19:58:11,395 INFO L226 Difference]: Without dead ends: 2518 [2021-07-13 19:58:11,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2626.8ms TimeCoverageRelationStatistics Valid=705, Invalid=3717, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 19:58:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-07-13 19:58:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1147. [2021-07-13 19:58:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 2.398778359511344) internal successors, (2749), 1146 states have internal predecessors, (2749), 0 states have call successors, (0), 0 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 19:58:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 2749 transitions. [2021-07-13 19:58:11,409 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 2749 transitions. Word has length 30 [2021-07-13 19:58:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:11,410 INFO L482 AbstractCegarLoop]: Abstraction has 1147 states and 2749 transitions. [2021-07-13 19:58:11,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:58:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 2749 transitions. [2021-07-13 19:58:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:11,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:11,411 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] [2021-07-13 19:58:11,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:11,611 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:11,612 INFO L82 PathProgramCache]: Analyzing trace with hash 107590017, now seen corresponding path program 70 times [2021-07-13 19:58:11,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:11,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692600145] [2021-07-13 19:58:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:11,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:11,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692600145] [2021-07-13 19:58:11,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692600145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:11,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045268024] [2021-07-13 19:58:11,867 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:11,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:11,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:11,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:11,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:12,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:12,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:12,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:12,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:12,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:58:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:12,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045268024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:12,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:12,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:58:12,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116138529] [2021-07-13 19:58:12,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:58:12,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:12,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:58:12,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:58:12,077 INFO L87 Difference]: Start difference. First operand 1147 states and 2749 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:58:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:16,406 INFO L93 Difference]: Finished difference Result 3139 states and 7659 transitions. [2021-07-13 19:58:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 19:58:16,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:58:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:16,411 INFO L225 Difference]: With dead ends: 3139 [2021-07-13 19:58:16,411 INFO L226 Difference]: Without dead ends: 3124 [2021-07-13 19:58:16,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 3607.3ms TimeCoverageRelationStatistics Valid=1129, Invalid=6011, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 19:58:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2021-07-13 19:58:16,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 1159. [2021-07-13 19:58:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 2.3998272884283245) internal successors, (2779), 1158 states have internal predecessors, (2779), 0 states have call successors, (0), 0 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 19:58:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 2779 transitions. [2021-07-13 19:58:16,436 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 2779 transitions. Word has length 30 [2021-07-13 19:58:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:16,436 INFO L482 AbstractCegarLoop]: Abstraction has 1159 states and 2779 transitions. [2021-07-13 19:58:16,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:58:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 2779 transitions. [2021-07-13 19:58:16,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:16,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:16,438 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] [2021-07-13 19:58:16,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:16,641 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:16,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:16,641 INFO L82 PathProgramCache]: Analyzing trace with hash -27211391, now seen corresponding path program 71 times [2021-07-13 19:58:16,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:16,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716805275] [2021-07-13 19:58:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:16,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:16,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716805275] [2021-07-13 19:58:16,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716805275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:16,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181663181] [2021-07-13 19:58:16,896 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:16,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:58:16,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:16,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:16,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:17,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:17,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:17,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:17,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:17,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:58:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:17,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181663181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:17,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:17,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:58:17,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740045783] [2021-07-13 19:58:17,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:17,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:17,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:17,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:17,089 INFO L87 Difference]: Start difference. First operand 1159 states and 2779 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:58:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:19,891 INFO L93 Difference]: Finished difference Result 2800 states and 6851 transitions. [2021-07-13 19:58:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:58:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 30 [2021-07-13 19:58:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:19,895 INFO L225 Difference]: With dead ends: 2800 [2021-07-13 19:58:19,895 INFO L226 Difference]: Without dead ends: 2783 [2021-07-13 19:58:19,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 2247.8ms TimeCoverageRelationStatistics Valid=594, Invalid=3066, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:58:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-07-13 19:58:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 1150. [2021-07-13 19:58:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 2.3977371627502175) internal successors, (2755), 1149 states have internal predecessors, (2755), 0 states have call successors, (0), 0 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 19:58:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 2755 transitions. [2021-07-13 19:58:19,911 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 2755 transitions. Word has length 30 [2021-07-13 19:58:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:19,912 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 2755 transitions. [2021-07-13 19:58:19,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:58:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 2755 transitions. [2021-07-13 19:58:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:19,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:19,913 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] [2021-07-13 19:58:20,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:20,113 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:20,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:20,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1771046495, now seen corresponding path program 72 times [2021-07-13 19:58:20,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:20,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004669762] [2021-07-13 19:58:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:20,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:20,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004669762] [2021-07-13 19:58:20,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004669762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:20,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260223779] [2021-07-13 19:58:20,374 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:20,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:58:20,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:20,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:20,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:20,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:20,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:20,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:20,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:20,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:58:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:20,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260223779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:20,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:20,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:58:20,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136133192] [2021-07-13 19:58:20,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:58:20,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:58:20,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:58:20,604 INFO L87 Difference]: Start difference. First operand 1150 states and 2755 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:58:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:23,956 INFO L93 Difference]: Finished difference Result 2533 states and 6137 transitions. [2021-07-13 19:58:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 19:58:23,956 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:58:23,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:23,960 INFO L225 Difference]: With dead ends: 2533 [2021-07-13 19:58:23,960 INFO L226 Difference]: Without dead ends: 2514 [2021-07-13 19:58:23,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 2714.4ms TimeCoverageRelationStatistics Valid=739, Invalid=3817, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 19:58:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-13 19:58:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1146. [2021-07-13 19:58:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 2.399126637554585) internal successors, (2747), 1145 states have internal predecessors, (2747), 0 states have call successors, (0), 0 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 19:58:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 2747 transitions. [2021-07-13 19:58:23,974 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 2747 transitions. Word has length 30 [2021-07-13 19:58:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:23,974 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 2747 transitions. [2021-07-13 19:58:23,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:58:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 2747 transitions. [2021-07-13 19:58:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:23,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:23,976 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] [2021-07-13 19:58:24,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:24,176 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:24,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:24,176 INFO L82 PathProgramCache]: Analyzing trace with hash 580935999, now seen corresponding path program 73 times [2021-07-13 19:58:24,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:24,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437132991] [2021-07-13 19:58:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:24,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437132991] [2021-07-13 19:58:24,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437132991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335891364] [2021-07-13 19:58:24,434 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:24,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:24,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:24,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:24,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:24,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:24,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:24,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:58:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:24,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335891364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:24,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:24,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:58:24,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725123871] [2021-07-13 19:58:24,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:58:24,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:24,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:58:24,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:58:24,623 INFO L87 Difference]: Start difference. First operand 1146 states and 2747 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:26,261 INFO L93 Difference]: Finished difference Result 3118 states and 7723 transitions. [2021-07-13 19:58:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:58:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:26,266 INFO L225 Difference]: With dead ends: 3118 [2021-07-13 19:58:26,266 INFO L226 Difference]: Without dead ends: 3105 [2021-07-13 19:58:26,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1369.4ms TimeCoverageRelationStatistics Valid=408, Invalid=1848, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:58:26,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2021-07-13 19:58:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 1154. [2021-07-13 19:58:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 2.3972246313963574) internal successors, (2764), 1153 states have internal predecessors, (2764), 0 states have call successors, (0), 0 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 19:58:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 2764 transitions. [2021-07-13 19:58:26,283 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 2764 transitions. Word has length 30 [2021-07-13 19:58:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:26,284 INFO L482 AbstractCegarLoop]: Abstraction has 1154 states and 2764 transitions. [2021-07-13 19:58:26,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:26,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 2764 transitions. [2021-07-13 19:58:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:26,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:26,285 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] [2021-07-13 19:58:26,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-13 19:58:26,485 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1957630247, now seen corresponding path program 74 times [2021-07-13 19:58:26,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:26,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978654530] [2021-07-13 19:58:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:26,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:26,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978654530] [2021-07-13 19:58:26,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978654530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:26,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221998532] [2021-07-13 19:58:26,754 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:26,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:26,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:26,776 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:26,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:26,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:26,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:26,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:26,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:26,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:58:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:26,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221998532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:26,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:26,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:58:26,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069574093] [2021-07-13 19:58:26,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:58:26,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:26,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:58:26,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:58:26,931 INFO L87 Difference]: Start difference. First operand 1154 states and 2764 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:28,410 INFO L93 Difference]: Finished difference Result 2899 states and 7169 transitions. [2021-07-13 19:58:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:58:28,411 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:28,414 INFO L225 Difference]: With dead ends: 2899 [2021-07-13 19:58:28,414 INFO L226 Difference]: Without dead ends: 2882 [2021-07-13 19:58:28,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1246.2ms TimeCoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:58:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2021-07-13 19:58:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 1143. [2021-07-13 19:58:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.3957968476357268) internal successors, (2736), 1142 states have internal predecessors, (2736), 0 states have call successors, (0), 0 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 19:58:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2736 transitions. [2021-07-13 19:58:28,430 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2736 transitions. Word has length 30 [2021-07-13 19:58:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:28,430 INFO L482 AbstractCegarLoop]: Abstraction has 1143 states and 2736 transitions. [2021-07-13 19:58:28,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2736 transitions. [2021-07-13 19:58:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:28,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:28,432 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] [2021-07-13 19:58:28,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-13 19:58:28,632 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:28,632 INFO L82 PathProgramCache]: Analyzing trace with hash -428676179, now seen corresponding path program 75 times [2021-07-13 19:58:28,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:28,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5416189] [2021-07-13 19:58:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:28,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:28,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5416189] [2021-07-13 19:58:28,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5416189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:28,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865118847] [2021-07-13 19:58:28,977 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:29,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:58:29,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:29,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:29,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:29,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 19:58:29,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:29,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:29,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:29,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:10 [2021-07-13 19:58:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:29,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865118847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:29,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:29,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-13 19:58:29,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46452943] [2021-07-13 19:58:29,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:58:29,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:29,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:58:29,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:58:29,364 INFO L87 Difference]: Start difference. First operand 1143 states and 2736 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 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 19:58:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:30,501 INFO L93 Difference]: Finished difference Result 2429 states and 5982 transitions. [2021-07-13 19:58:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:58:30,501 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 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 30 [2021-07-13 19:58:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:30,504 INFO L225 Difference]: With dead ends: 2429 [2021-07-13 19:58:30,504 INFO L226 Difference]: Without dead ends: 2419 [2021-07-13 19:58:30,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1090.9ms TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:58:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-07-13 19:58:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 1134. [2021-07-13 19:58:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 2.3936451897616946) internal successors, (2712), 1133 states have internal predecessors, (2712), 0 states have call successors, (0), 0 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 19:58:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 2712 transitions. [2021-07-13 19:58:30,519 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 2712 transitions. Word has length 30 [2021-07-13 19:58:30,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:30,520 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 2712 transitions. [2021-07-13 19:58:30,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 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 19:58:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 2712 transitions. [2021-07-13 19:58:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:30,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:30,521 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] [2021-07-13 19:58:30,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-07-13 19:58:30,722 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash 645569505, now seen corresponding path program 76 times [2021-07-13 19:58:30,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:30,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650164038] [2021-07-13 19:58:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:30,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:30,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650164038] [2021-07-13 19:58:30,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650164038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:30,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631595633] [2021-07-13 19:58:30,999 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:31,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:31,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:31,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:31,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:31,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:31,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:31,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:31,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:31,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:58:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:31,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631595633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:31,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:31,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:58:31,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787218006] [2021-07-13 19:58:31,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:58:31,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:31,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:58:31,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:58:31,181 INFO L87 Difference]: Start difference. First operand 1134 states and 2712 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:33,190 INFO L93 Difference]: Finished difference Result 2737 states and 6718 transitions. [2021-07-13 19:58:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:58:33,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:33,194 INFO L225 Difference]: With dead ends: 2737 [2021-07-13 19:58:33,194 INFO L226 Difference]: Without dead ends: 2724 [2021-07-13 19:58:33,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1654.7ms TimeCoverageRelationStatistics Valid=438, Invalid=2318, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:58:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-07-13 19:58:33,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1148. [2021-07-13 19:58:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 2.394943330427201) internal successors, (2747), 1147 states have internal predecessors, (2747), 0 states have call successors, (0), 0 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 19:58:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 2747 transitions. [2021-07-13 19:58:33,213 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 2747 transitions. Word has length 30 [2021-07-13 19:58:33,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:33,213 INFO L482 AbstractCegarLoop]: Abstraction has 1148 states and 2747 transitions. [2021-07-13 19:58:33,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 2747 transitions. [2021-07-13 19:58:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:33,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:33,214 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] [2021-07-13 19:58:33,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-13 19:58:33,415 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:33,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1892996741, now seen corresponding path program 77 times [2021-07-13 19:58:33,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:33,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236876321] [2021-07-13 19:58:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:33,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:33,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236876321] [2021-07-13 19:58:33,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236876321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:33,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417354321] [2021-07-13 19:58:33,719 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:33,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:58:33,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:33,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:33,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:33,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:33,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:33,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:33,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:58:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:33,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417354321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:33,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:33,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-07-13 19:58:33,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412104775] [2021-07-13 19:58:33,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:58:33,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:33,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:58:33,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:58:33,905 INFO L87 Difference]: Start difference. First operand 1148 states and 2747 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:35,566 INFO L93 Difference]: Finished difference Result 2580 states and 6331 transitions. [2021-07-13 19:58:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:58:35,566 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:35,569 INFO L225 Difference]: With dead ends: 2580 [2021-07-13 19:58:35,570 INFO L226 Difference]: Without dead ends: 2563 [2021-07-13 19:58:35,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1321.5ms TimeCoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:58:35,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-07-13 19:58:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 1137. [2021-07-13 19:58:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.392605633802817) internal successors, (2718), 1136 states have internal predecessors, (2718), 0 states have call successors, (0), 0 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 19:58:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2718 transitions. [2021-07-13 19:58:35,586 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2718 transitions. Word has length 30 [2021-07-13 19:58:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:35,586 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 2718 transitions. [2021-07-13 19:58:35,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2718 transitions. [2021-07-13 19:58:35,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:35,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:35,587 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] [2021-07-13 19:58:35,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:35,787 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:35,788 INFO L82 PathProgramCache]: Analyzing trace with hash -979016249, now seen corresponding path program 78 times [2021-07-13 19:58:35,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:35,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997882605] [2021-07-13 19:58:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:36,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:36,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997882605] [2021-07-13 19:58:36,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997882605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:36,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728358833] [2021-07-13 19:58:36,112 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:36,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:58:36,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:36,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:36,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:36,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:58:36,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:36,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:36,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:36,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:58:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:36,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728358833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:36,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:36,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:58:36,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456090916] [2021-07-13 19:58:36,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:58:36,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:58:36,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:58:36,322 INFO L87 Difference]: Start difference. First operand 1137 states and 2718 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:58:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:39,346 INFO L93 Difference]: Finished difference Result 2451 states and 5943 transitions. [2021-07-13 19:58:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 19:58:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:58:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:39,350 INFO L225 Difference]: With dead ends: 2451 [2021-07-13 19:58:39,350 INFO L226 Difference]: Without dead ends: 2435 [2021-07-13 19:58:39,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 2363.1ms TimeCoverageRelationStatistics Valid=661, Invalid=3761, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 19:58:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-07-13 19:58:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1134. [2021-07-13 19:58:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 2.3936451897616946) internal successors, (2712), 1133 states have internal predecessors, (2712), 0 states have call successors, (0), 0 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 19:58:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 2712 transitions. [2021-07-13 19:58:39,364 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 2712 transitions. Word has length 30 [2021-07-13 19:58:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:39,364 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 2712 transitions. [2021-07-13 19:58:39,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:58:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 2712 transitions. [2021-07-13 19:58:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:39,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:39,365 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] [2021-07-13 19:58:39,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:39,567 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:39,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1564258767, now seen corresponding path program 43 times [2021-07-13 19:58:39,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:39,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318954523] [2021-07-13 19:58:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:39,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:39,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318954523] [2021-07-13 19:58:39,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318954523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:39,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345978279] [2021-07-13 19:58:39,853 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:39,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:39,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:40,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 19:58:40,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:40,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:40,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:40,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-07-13 19:58:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:40,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345978279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:40,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:40,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 19:58:40,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710422510] [2021-07-13 19:58:40,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:58:40,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:40,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:58:40,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:58:40,104 INFO L87 Difference]: Start difference. First operand 1134 states and 2712 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:43,456 INFO L93 Difference]: Finished difference Result 2620 states and 6365 transitions. [2021-07-13 19:58:43,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 19:58:43,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:43,460 INFO L225 Difference]: With dead ends: 2620 [2021-07-13 19:58:43,460 INFO L226 Difference]: Without dead ends: 2603 [2021-07-13 19:58:43,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 2699.6ms TimeCoverageRelationStatistics Valid=796, Invalid=4316, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 19:58:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-07-13 19:58:43,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1152. [2021-07-13 19:58:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.3944396177237186) internal successors, (2756), 1151 states have internal predecessors, (2756), 0 states have call successors, (0), 0 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 19:58:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2756 transitions. [2021-07-13 19:58:43,476 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2756 transitions. Word has length 30 [2021-07-13 19:58:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:43,476 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2756 transitions. [2021-07-13 19:58:43,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2756 transitions. [2021-07-13 19:58:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:43,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:43,477 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] [2021-07-13 19:58:43,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:43,678 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:43,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:43,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1743776207, now seen corresponding path program 44 times [2021-07-13 19:58:43,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:43,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140581924] [2021-07-13 19:58:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:43,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:43,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140581924] [2021-07-13 19:58:43,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140581924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:43,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129977557] [2021-07-13 19:58:43,957 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:43,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:43,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:43,979 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:43,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:44,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:44,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:44,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:44,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:44,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:58:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:44,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129977557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:44,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:44,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 19:58:44,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127711192] [2021-07-13 19:58:44,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:58:44,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:44,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:58:44,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:58:44,185 INFO L87 Difference]: Start difference. First operand 1152 states and 2756 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:47,956 INFO L93 Difference]: Finished difference Result 3154 states and 7689 transitions. [2021-07-13 19:58:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 19:58:47,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:47,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:47,961 INFO L225 Difference]: With dead ends: 3154 [2021-07-13 19:58:47,961 INFO L226 Difference]: Without dead ends: 3139 [2021-07-13 19:58:47,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 3062.6ms TimeCoverageRelationStatistics Valid=1123, Invalid=5849, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 19:58:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-07-13 19:58:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 1163. [2021-07-13 19:58:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 2.395869191049914) internal successors, (2784), 1162 states have internal predecessors, (2784), 0 states have call successors, (0), 0 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 19:58:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2784 transitions. [2021-07-13 19:58:47,978 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2784 transitions. Word has length 30 [2021-07-13 19:58:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:47,978 INFO L482 AbstractCegarLoop]: Abstraction has 1163 states and 2784 transitions. [2021-07-13 19:58:47,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2784 transitions. [2021-07-13 19:58:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:47,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:47,979 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] [2021-07-13 19:58:48,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:48,179 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:48,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1608974799, now seen corresponding path program 45 times [2021-07-13 19:58:48,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:48,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168792046] [2021-07-13 19:58:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:48,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:48,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168792046] [2021-07-13 19:58:48,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168792046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:48,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436254822] [2021-07-13 19:58:48,450 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:48,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:58:48,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:48,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:58:48,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:48,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-07-13 19:58:48,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:48,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:48,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:48,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:45 [2021-07-13 19:58:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:48,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436254822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:48,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:48,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 27 [2021-07-13 19:58:48,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253198793] [2021-07-13 19:58:48,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:58:48,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:48,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:58:48,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:58:48,896 INFO L87 Difference]: Start difference. First operand 1163 states and 2784 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:53,024 INFO L93 Difference]: Finished difference Result 2721 states and 6642 transitions. [2021-07-13 19:58:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 19:58:53,024 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:53,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:53,028 INFO L225 Difference]: With dead ends: 2721 [2021-07-13 19:58:53,028 INFO L226 Difference]: Without dead ends: 2700 [2021-07-13 19:58:53,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 2918.7ms TimeCoverageRelationStatistics Valid=775, Invalid=4925, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 19:58:53,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2021-07-13 19:58:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 1143. [2021-07-13 19:58:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.393169877408056) internal successors, (2733), 1142 states have internal predecessors, (2733), 0 states have call successors, (0), 0 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 19:58:53,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2733 transitions. [2021-07-13 19:58:53,043 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2733 transitions. Word has length 30 [2021-07-13 19:58:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:53,043 INFO L482 AbstractCegarLoop]: Abstraction has 1143 states and 2733 transitions. [2021-07-13 19:58:53,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:53,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2733 transitions. [2021-07-13 19:58:53,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:53,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:53,045 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] [2021-07-13 19:58:53,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:53,245 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2031304337, now seen corresponding path program 46 times [2021-07-13 19:58:53,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:53,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429945852] [2021-07-13 19:58:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:53,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:53,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429945852] [2021-07-13 19:58:53,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429945852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:53,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547463144] [2021-07-13 19:58:53,496 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:53,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:53,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:53,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:53,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:53,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:53,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:53,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:53,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:53,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:58:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:53,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547463144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:53,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:53,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 19:58:53,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905443111] [2021-07-13 19:58:53,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:58:53,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:53,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:58:53,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:58:53,725 INFO L87 Difference]: Start difference. First operand 1143 states and 2733 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:58:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:55,916 INFO L93 Difference]: Finished difference Result 2807 states and 6902 transitions. [2021-07-13 19:58:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:58:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:58:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:55,920 INFO L225 Difference]: With dead ends: 2807 [2021-07-13 19:58:55,920 INFO L226 Difference]: Without dead ends: 2794 [2021-07-13 19:58:55,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1766.2ms TimeCoverageRelationStatistics Valid=498, Invalid=2808, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:58:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-07-13 19:58:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1157. [2021-07-13 19:58:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.394463667820069) internal successors, (2768), 1156 states have internal predecessors, (2768), 0 states have call successors, (0), 0 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 19:58:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2768 transitions. [2021-07-13 19:58:55,937 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2768 transitions. Word has length 30 [2021-07-13 19:58:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:55,937 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 2768 transitions. [2021-07-13 19:58:55,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:58:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2768 transitions. [2021-07-13 19:58:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:55,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:55,939 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] [2021-07-13 19:58:56,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:56,139 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:56,139 INFO L82 PathProgramCache]: Analyzing trace with hash -507261909, now seen corresponding path program 47 times [2021-07-13 19:58:56,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:56,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449552203] [2021-07-13 19:58:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:56,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:56,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449552203] [2021-07-13 19:58:56,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449552203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:56,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969296469] [2021-07-13 19:58:56,383 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:56,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:58:56,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:56,410 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:56,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:56,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:56,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:58:56,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:56,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:56,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:56,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-07-13 19:58:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:56,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969296469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:56,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:56,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 19:58:56,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138661039] [2021-07-13 19:58:56,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:58:56,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:56,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:58:56,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:58:56,660 INFO L87 Difference]: Start difference. First operand 1157 states and 2768 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:58:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:58,404 INFO L93 Difference]: Finished difference Result 2663 states and 6550 transitions. [2021-07-13 19:58:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:58:58,405 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:58:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:58,409 INFO L225 Difference]: With dead ends: 2663 [2021-07-13 19:58:58,409 INFO L226 Difference]: Without dead ends: 2646 [2021-07-13 19:58:58,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1360.8ms TimeCoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:58:58,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-07-13 19:58:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 1146. [2021-07-13 19:58:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 2.393013100436681) internal successors, (2740), 1145 states have internal predecessors, (2740), 0 states have call successors, (0), 0 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 19:58:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 2740 transitions. [2021-07-13 19:58:58,426 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 2740 transitions. Word has length 30 [2021-07-13 19:58:58,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:58,426 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 2740 transitions. [2021-07-13 19:58:58,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:58:58,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 2740 transitions. [2021-07-13 19:58:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:58,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:58,427 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] [2021-07-13 19:58:58,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-07-13 19:58:58,628 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:58,628 INFO L82 PathProgramCache]: Analyzing trace with hash 28182299, now seen corresponding path program 48 times [2021-07-13 19:58:58,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:58,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068921634] [2021-07-13 19:58:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:58,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:58,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068921634] [2021-07-13 19:58:58,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068921634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:58,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546777154] [2021-07-13 19:58:58,879 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:58,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:58:58,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:58,902 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:58:58,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:59,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:59,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:59,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:59,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:59,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 19:58:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:59,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546777154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:59,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:59,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-13 19:58:59,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071348929] [2021-07-13 19:58:59,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:59,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:59,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:59,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:59,143 INFO L87 Difference]: Start difference. First operand 1146 states and 2740 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:01,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:01,202 INFO L93 Difference]: Finished difference Result 2660 states and 6526 transitions. [2021-07-13 19:59:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:59:01,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:01,206 INFO L225 Difference]: With dead ends: 2660 [2021-07-13 19:59:01,206 INFO L226 Difference]: Without dead ends: 2650 [2021-07-13 19:59:01,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1248.8ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:59:01,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-07-13 19:59:01,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 1145. [2021-07-13 19:59:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 2.3933566433566433) internal successors, (2738), 1144 states have internal predecessors, (2738), 0 states have call successors, (0), 0 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 19:59:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 2738 transitions. [2021-07-13 19:59:01,226 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 2738 transitions. Word has length 30 [2021-07-13 19:59:01,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:01,226 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 2738 transitions. [2021-07-13 19:59:01,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 2738 transitions. [2021-07-13 19:59:01,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:01,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:01,228 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] [2021-07-13 19:59:01,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:01,428 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:01,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1247603719, now seen corresponding path program 49 times [2021-07-13 19:59:01,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:01,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821578635] [2021-07-13 19:59:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:01,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:01,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821578635] [2021-07-13 19:59:01,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821578635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:01,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291243482] [2021-07-13 19:59:01,661 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:01,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:01,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:01,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:01,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:01,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:01,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:01,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:59:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:01,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291243482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:01,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:01,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 19:59:01,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118785636] [2021-07-13 19:59:01,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:01,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:01,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:01,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:01,920 INFO L87 Difference]: Start difference. First operand 1145 states and 2738 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:59:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:04,397 INFO L93 Difference]: Finished difference Result 2863 states and 7054 transitions. [2021-07-13 19:59:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:59:04,397 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:59:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:04,401 INFO L225 Difference]: With dead ends: 2863 [2021-07-13 19:59:04,401 INFO L226 Difference]: Without dead ends: 2850 [2021-07-13 19:59:04,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1944.7ms TimeCoverageRelationStatistics Valid=569, Invalid=2971, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:59:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-07-13 19:59:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 1188. [2021-07-13 19:59:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 2.40016849199663) internal successors, (2849), 1187 states have internal predecessors, (2849), 0 states have call successors, (0), 0 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 19:59:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 2849 transitions. [2021-07-13 19:59:04,418 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 2849 transitions. Word has length 30 [2021-07-13 19:59:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:04,418 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 2849 transitions. [2021-07-13 19:59:04,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:59:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 2849 transitions. [2021-07-13 19:59:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:04,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:04,419 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] [2021-07-13 19:59:04,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:04,620 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:04,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1290962527, now seen corresponding path program 50 times [2021-07-13 19:59:04,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:04,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657583214] [2021-07-13 19:59:04,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:04,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:04,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657583214] [2021-07-13 19:59:04,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657583214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:04,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951285938] [2021-07-13 19:59:04,876 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:04,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:04,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:04,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:04,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:05,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:05,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:05,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:05,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:05,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:59:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:05,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951285938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:05,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:05,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 19:59:05,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399816693] [2021-07-13 19:59:05,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:05,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:05,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:05,085 INFO L87 Difference]: Start difference. First operand 1188 states and 2849 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:59:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:07,140 INFO L93 Difference]: Finished difference Result 2704 states and 6660 transitions. [2021-07-13 19:59:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:59:07,141 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:59:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:07,144 INFO L225 Difference]: With dead ends: 2704 [2021-07-13 19:59:07,144 INFO L226 Difference]: Without dead ends: 2687 [2021-07-13 19:59:07,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1684.8ms TimeCoverageRelationStatistics Valid=531, Invalid=2549, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:59:07,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-07-13 19:59:07,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1177. [2021-07-13 19:59:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 2.3988095238095237) internal successors, (2821), 1176 states have internal predecessors, (2821), 0 states have call successors, (0), 0 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 19:59:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2821 transitions. [2021-07-13 19:59:07,161 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2821 transitions. Word has length 30 [2021-07-13 19:59:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:07,161 INFO L482 AbstractCegarLoop]: Abstraction has 1177 states and 2821 transitions. [2021-07-13 19:59:07,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:59:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2821 transitions. [2021-07-13 19:59:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:07,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:07,162 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] [2021-07-13 19:59:07,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:07,363 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:07,363 INFO L82 PathProgramCache]: Analyzing trace with hash -755518319, now seen corresponding path program 51 times [2021-07-13 19:59:07,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:07,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061366866] [2021-07-13 19:59:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:07,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:07,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061366866] [2021-07-13 19:59:07,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061366866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:07,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076576965] [2021-07-13 19:59:07,584 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:07,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:59:07,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:07,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:59:07,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:07,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:07,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:07,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-07-13 19:59:07,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:59:07,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:07,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:07,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-07-13 19:59:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:08,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076576965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:08,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:08,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-07-13 19:59:08,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184260985] [2021-07-13 19:59:08,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:59:08,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:08,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:59:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:59:08,033 INFO L87 Difference]: Start difference. First operand 1177 states and 2821 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:10,999 INFO L93 Difference]: Finished difference Result 2634 states and 6494 transitions. [2021-07-13 19:59:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:59:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:11,003 INFO L225 Difference]: With dead ends: 2634 [2021-07-13 19:59:11,003 INFO L226 Difference]: Without dead ends: 2624 [2021-07-13 19:59:11,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 2083.4ms TimeCoverageRelationStatistics Valid=463, Invalid=3569, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 19:59:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-07-13 19:59:11,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 1181. [2021-07-13 19:59:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 2.4008474576271186) internal successors, (2833), 1180 states have internal predecessors, (2833), 0 states have call successors, (0), 0 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 19:59:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 2833 transitions. [2021-07-13 19:59:11,018 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 2833 transitions. Word has length 30 [2021-07-13 19:59:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:11,019 INFO L482 AbstractCegarLoop]: Abstraction has 1181 states and 2833 transitions. [2021-07-13 19:59:11,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 2833 transitions. [2021-07-13 19:59:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:11,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:11,020 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] [2021-07-13 19:59:11,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:11,220 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:11,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:11,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1286800275, now seen corresponding path program 52 times [2021-07-13 19:59:11,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:11,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985579680] [2021-07-13 19:59:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:11,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:11,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985579680] [2021-07-13 19:59:11,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985579680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:11,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880797526] [2021-07-13 19:59:11,443 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:11,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:11,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:11,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:11,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:11,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:11,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:11,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:11,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:11,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:59:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:11,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880797526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:11,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:11,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-13 19:59:11,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130886114] [2021-07-13 19:59:11,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:11,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:11,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:11,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:11,670 INFO L87 Difference]: Start difference. First operand 1181 states and 2833 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:13,114 INFO L93 Difference]: Finished difference Result 2584 states and 6359 transitions. [2021-07-13 19:59:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:59:13,114 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:13,117 INFO L225 Difference]: With dead ends: 2584 [2021-07-13 19:59:13,118 INFO L226 Difference]: Without dead ends: 2574 [2021-07-13 19:59:13,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1020.0ms TimeCoverageRelationStatistics Valid=292, Invalid=1778, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:59:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-07-13 19:59:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 1175. [2021-07-13 19:59:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 2.3986371379897786) internal successors, (2816), 1174 states have internal predecessors, (2816), 0 states have call successors, (0), 0 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 19:59:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 2816 transitions. [2021-07-13 19:59:13,134 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 2816 transitions. Word has length 30 [2021-07-13 19:59:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:13,134 INFO L482 AbstractCegarLoop]: Abstraction has 1175 states and 2816 transitions. [2021-07-13 19:59:13,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 2816 transitions. [2021-07-13 19:59:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:13,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:13,135 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] [2021-07-13 19:59:13,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:13,336 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:13,336 INFO L82 PathProgramCache]: Analyzing trace with hash -350772181, now seen corresponding path program 53 times [2021-07-13 19:59:13,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:13,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027395709] [2021-07-13 19:59:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:13,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:13,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027395709] [2021-07-13 19:59:13,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027395709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:13,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252594830] [2021-07-13 19:59:13,554 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:13,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:59:13,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:13,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:13,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:13,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:13,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:13,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:13,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:13,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:59:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:13,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252594830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:13,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:13,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-13 19:59:13,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147814802] [2021-07-13 19:59:13,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:13,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:13,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:13,806 INFO L87 Difference]: Start difference. First operand 1175 states and 2816 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:15,194 INFO L93 Difference]: Finished difference Result 2593 states and 6381 transitions. [2021-07-13 19:59:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:59:15,195 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:15,198 INFO L225 Difference]: With dead ends: 2593 [2021-07-13 19:59:15,198 INFO L226 Difference]: Without dead ends: 2583 [2021-07-13 19:59:15,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1028.5ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-07-13 19:59:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1172. [2021-07-13 19:59:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 2.398804440649018) internal successors, (2809), 1171 states have internal predecessors, (2809), 0 states have call successors, (0), 0 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 19:59:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 2809 transitions. [2021-07-13 19:59:15,214 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 2809 transitions. Word has length 30 [2021-07-13 19:59:15,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:15,214 INFO L482 AbstractCegarLoop]: Abstraction has 1172 states and 2809 transitions. [2021-07-13 19:59:15,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 2809 transitions. [2021-07-13 19:59:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:15,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:15,215 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] [2021-07-13 19:59:15,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:15,416 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:15,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:15,416 INFO L82 PathProgramCache]: Analyzing trace with hash 740706071, now seen corresponding path program 79 times [2021-07-13 19:59:15,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:15,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852294659] [2021-07-13 19:59:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:15,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:15,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852294659] [2021-07-13 19:59:15,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852294659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:15,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141930202] [2021-07-13 19:59:15,681 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:15,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:15,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:15,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:59:15,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:15,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:15,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:15,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:59:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:15,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141930202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:15,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:15,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:59:15,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249166714] [2021-07-13 19:59:15,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:15,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:15,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:15,906 INFO L87 Difference]: Start difference. First operand 1172 states and 2809 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:59:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:17,519 INFO L93 Difference]: Finished difference Result 2608 states and 6335 transitions. [2021-07-13 19:59:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:59:17,519 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:59:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:17,523 INFO L225 Difference]: With dead ends: 2608 [2021-07-13 19:59:17,523 INFO L226 Difference]: Without dead ends: 2583 [2021-07-13 19:59:17,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1124.1ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-07-13 19:59:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1190. [2021-07-13 19:59:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 2.3994953742640877) internal successors, (2853), 1189 states have internal predecessors, (2853), 0 states have call successors, (0), 0 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 19:59:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2853 transitions. [2021-07-13 19:59:17,539 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2853 transitions. Word has length 30 [2021-07-13 19:59:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:17,539 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 2853 transitions. [2021-07-13 19:59:17,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:59:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2853 transitions. [2021-07-13 19:59:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:17,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:17,540 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] [2021-07-13 19:59:17,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-07-13 19:59:17,741 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1978485225, now seen corresponding path program 80 times [2021-07-13 19:59:17,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:17,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410191454] [2021-07-13 19:59:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:18,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:18,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410191454] [2021-07-13 19:59:18,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410191454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:18,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985866027] [2021-07-13 19:59:18,024 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:18,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:18,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:18,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:18,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:18,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:59:18,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:18,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:18,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:18,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:59:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:18,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985866027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:18,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:18,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:59:18,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048736486] [2021-07-13 19:59:18,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:18,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:18,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:18,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:18,231 INFO L87 Difference]: Start difference. First operand 1190 states and 2853 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:59:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:20,025 INFO L93 Difference]: Finished difference Result 3097 states and 7611 transitions. [2021-07-13 19:59:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:59:20,025 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:59:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:20,029 INFO L225 Difference]: With dead ends: 3097 [2021-07-13 19:59:20,029 INFO L226 Difference]: Without dead ends: 3084 [2021-07-13 19:59:20,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1413.7ms TimeCoverageRelationStatistics Valid=457, Invalid=2093, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:59:20,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-07-13 19:59:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1208. [2021-07-13 19:59:20,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.4026512013256007) internal successors, (2900), 1207 states have internal predecessors, (2900), 0 states have call successors, (0), 0 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 19:59:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2900 transitions. [2021-07-13 19:59:20,048 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2900 transitions. Word has length 30 [2021-07-13 19:59:20,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:20,048 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2900 transitions. [2021-07-13 19:59:20,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:59:20,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2900 transitions. [2021-07-13 19:59:20,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:20,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:20,049 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] [2021-07-13 19:59:20,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:20,250 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:20,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2113286633, now seen corresponding path program 81 times [2021-07-13 19:59:20,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:20,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659970992] [2021-07-13 19:59:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:20,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:20,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659970992] [2021-07-13 19:59:20,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659970992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:20,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713521214] [2021-07-13 19:59:20,493 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:20,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:59:20,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:20,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:20,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:20,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:59:20,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:20,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:20,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:20,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-07-13 19:59:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:20,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713521214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:20,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:20,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-07-13 19:59:20,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299754566] [2021-07-13 19:59:20,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:59:20,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:59:20,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:59:20,712 INFO L87 Difference]: Start difference. First operand 1208 states and 2900 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:59:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:22,278 INFO L93 Difference]: Finished difference Result 2802 states and 6896 transitions. [2021-07-13 19:59:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:59:22,278 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 30 [2021-07-13 19:59:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:22,282 INFO L225 Difference]: With dead ends: 2802 [2021-07-13 19:59:22,282 INFO L226 Difference]: Without dead ends: 2785 [2021-07-13 19:59:22,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1221.7ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:59:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-07-13 19:59:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 1194. [2021-07-13 19:59:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 2.398994132439229) internal successors, (2862), 1193 states have internal predecessors, (2862), 0 states have call successors, (0), 0 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 19:59:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 2862 transitions. [2021-07-13 19:59:22,300 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 2862 transitions. Word has length 30 [2021-07-13 19:59:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:22,300 INFO L482 AbstractCegarLoop]: Abstraction has 1194 states and 2862 transitions. [2021-07-13 19:59:22,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 19:59:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 2862 transitions. [2021-07-13 19:59:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:22,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:22,301 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] [2021-07-13 19:59:22,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-13 19:59:22,502 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:22,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:22,502 INFO L82 PathProgramCache]: Analyzing trace with hash -315028747, now seen corresponding path program 82 times [2021-07-13 19:59:22,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:22,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239528824] [2021-07-13 19:59:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:22,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:22,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239528824] [2021-07-13 19:59:22,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239528824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:22,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543984537] [2021-07-13 19:59:22,742 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:22,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:22,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:22,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:22,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:22,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:59:22,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:22,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:22,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:22,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:59:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:22,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543984537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:22,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:22,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:59:22,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109228177] [2021-07-13 19:59:22,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:22,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:22,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:22,961 INFO L87 Difference]: Start difference. First operand 1194 states and 2862 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:59:24,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:24,637 INFO L93 Difference]: Finished difference Result 2514 states and 6112 transitions. [2021-07-13 19:59:24,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:59:24,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:59:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:24,640 INFO L225 Difference]: With dead ends: 2514 [2021-07-13 19:59:24,640 INFO L226 Difference]: Without dead ends: 2495 [2021-07-13 19:59:24,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1036.3ms TimeCoverageRelationStatistics Valid=303, Invalid=1589, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:59:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-07-13 19:59:24,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1179. [2021-07-13 19:59:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 2.401528013582343) internal successors, (2829), 1178 states have internal predecessors, (2829), 0 states have call successors, (0), 0 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 19:59:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 2829 transitions. [2021-07-13 19:59:24,656 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 2829 transitions. Word has length 30 [2021-07-13 19:59:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:24,657 INFO L482 AbstractCegarLoop]: Abstraction has 1179 states and 2829 transitions. [2021-07-13 19:59:24,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:59:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 2829 transitions. [2021-07-13 19:59:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:24,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:24,658 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] [2021-07-13 19:59:24,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:24,861 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:24,861 INFO L82 PathProgramCache]: Analyzing trace with hash -337896761, now seen corresponding path program 83 times [2021-07-13 19:59:24,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:24,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587413328] [2021-07-13 19:59:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:25,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:25,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587413328] [2021-07-13 19:59:25,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587413328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:25,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824670773] [2021-07-13 19:59:25,094 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:25,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:59:25,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:25,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:25,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:25,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 19:59:25,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:25,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:25,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:25,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-07-13 19:59:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:25,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824670773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:25,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:25,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-13 19:59:25,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695890346] [2021-07-13 19:59:25,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:25,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:25,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:25,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:25,379 INFO L87 Difference]: Start difference. First operand 1179 states and 2829 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:59:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:26,356 INFO L93 Difference]: Finished difference Result 2438 states and 5943 transitions. [2021-07-13 19:59:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:59:26,356 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:59:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:26,360 INFO L225 Difference]: With dead ends: 2438 [2021-07-13 19:59:26,360 INFO L226 Difference]: Without dead ends: 2429 [2021-07-13 19:59:26,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 753.3ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:59:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-07-13 19:59:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1181. [2021-07-13 19:59:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 2.4) internal successors, (2832), 1180 states have internal predecessors, (2832), 0 states have call successors, (0), 0 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 19:59:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 2832 transitions. [2021-07-13 19:59:26,375 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 2832 transitions. Word has length 30 [2021-07-13 19:59:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:26,375 INFO L482 AbstractCegarLoop]: Abstraction has 1181 states and 2832 transitions. [2021-07-13 19:59:26,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 19:59:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 2832 transitions. [2021-07-13 19:59:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:26,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:26,376 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] [2021-07-13 19:59:26,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-13 19:59:26,577 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:26,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1332100165, now seen corresponding path program 54 times [2021-07-13 19:59:26,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:26,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931884009] [2021-07-13 19:59:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:26,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:26,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931884009] [2021-07-13 19:59:26,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931884009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:26,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208996458] [2021-07-13 19:59:26,821 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:26,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:59:26,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:26,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:26,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:27,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:59:27,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:27,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:27,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:27,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 19:59:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:27,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208996458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:27,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:27,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 19:59:27,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770246867] [2021-07-13 19:59:27,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:27,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:27,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:27,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:27,085 INFO L87 Difference]: Start difference. First operand 1181 states and 2832 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:28,629 INFO L93 Difference]: Finished difference Result 2439 states and 5955 transitions. [2021-07-13 19:59:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:59:28,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:28,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:28,632 INFO L225 Difference]: With dead ends: 2439 [2021-07-13 19:59:28,632 INFO L226 Difference]: Without dead ends: 2422 [2021-07-13 19:59:28,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1164.1ms TimeCoverageRelationStatistics Valid=340, Invalid=1822, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:59:28,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-07-13 19:59:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1194. [2021-07-13 19:59:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 2.4006705783738473) internal successors, (2864), 1193 states have internal predecessors, (2864), 0 states have call successors, (0), 0 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 19:59:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 2864 transitions. [2021-07-13 19:59:28,647 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 2864 transitions. Word has length 30 [2021-07-13 19:59:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:28,647 INFO L482 AbstractCegarLoop]: Abstraction has 1194 states and 2864 transitions. [2021-07-13 19:59:28,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 2864 transitions. [2021-07-13 19:59:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:28,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:28,649 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] [2021-07-13 19:59:28,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:28,849 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:28,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1511617605, now seen corresponding path program 55 times [2021-07-13 19:59:28,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:28,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001658523] [2021-07-13 19:59:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:29,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:29,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001658523] [2021-07-13 19:59:29,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001658523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:29,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919719954] [2021-07-13 19:59:29,101 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:29,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:29,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:29,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:29,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:29,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:29,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:29,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:59:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:29,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919719954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:29,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:29,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 19:59:29,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580227789] [2021-07-13 19:59:29,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:29,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:29,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:29,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:29,333 INFO L87 Difference]: Start difference. First operand 1194 states and 2864 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:31,385 INFO L93 Difference]: Finished difference Result 3013 states and 7416 transitions. [2021-07-13 19:59:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:59:31,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:31,389 INFO L225 Difference]: With dead ends: 3013 [2021-07-13 19:59:31,389 INFO L226 Difference]: Without dead ends: 2998 [2021-07-13 19:59:31,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1621.1ms TimeCoverageRelationStatistics Valid=596, Invalid=2944, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:59:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2021-07-13 19:59:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 1205. [2021-07-13 19:59:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 2.4019933554817277) internal successors, (2892), 1204 states have internal predecessors, (2892), 0 states have call successors, (0), 0 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 19:59:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 2892 transitions. [2021-07-13 19:59:31,407 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 2892 transitions. Word has length 30 [2021-07-13 19:59:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:31,408 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 2892 transitions. [2021-07-13 19:59:31,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 2892 transitions. [2021-07-13 19:59:31,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:31,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:31,409 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] [2021-07-13 19:59:31,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:31,610 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:31,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:31,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1376816197, now seen corresponding path program 56 times [2021-07-13 19:59:31,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:31,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269428462] [2021-07-13 19:59:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:31,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:31,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269428462] [2021-07-13 19:59:31,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269428462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:31,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683151093] [2021-07-13 19:59:31,861 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:31,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:31,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:31,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:31,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:32,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:32,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:59:32,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:32,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:32,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:32,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-07-13 19:59:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:32,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683151093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:32,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:32,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 19:59:32,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109255371] [2021-07-13 19:59:32,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:32,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:32,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:32,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:32,088 INFO L87 Difference]: Start difference. First operand 1205 states and 2892 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:33,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:33,569 INFO L93 Difference]: Finished difference Result 2703 states and 6644 transitions. [2021-07-13 19:59:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:59:33,570 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:33,574 INFO L225 Difference]: With dead ends: 2703 [2021-07-13 19:59:33,574 INFO L226 Difference]: Without dead ends: 2684 [2021-07-13 19:59:33,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1125.2ms TimeCoverageRelationStatistics Valid=340, Invalid=1730, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:59:33,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-07-13 19:59:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 1185. [2021-07-13 19:59:33,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 2.3994932432432434) internal successors, (2841), 1184 states have internal predecessors, (2841), 0 states have call successors, (0), 0 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 19:59:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 2841 transitions. [2021-07-13 19:59:33,590 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 2841 transitions. Word has length 30 [2021-07-13 19:59:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:33,590 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 2841 transitions. [2021-07-13 19:59:33,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 2841 transitions. [2021-07-13 19:59:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:33,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:33,591 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] [2021-07-13 19:59:33,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-07-13 19:59:33,792 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1799145735, now seen corresponding path program 57 times [2021-07-13 19:59:33,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:33,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953441950] [2021-07-13 19:59:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:34,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:34,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953441950] [2021-07-13 19:59:34,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953441950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:34,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941221073] [2021-07-13 19:59:34,017 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:34,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:59:34,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:34,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:59:34,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:34,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:34,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 19:59:34,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:34,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:34,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:34,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-07-13 19:59:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:34,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941221073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:34,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:34,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-07-13 19:59:34,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451591442] [2021-07-13 19:59:34,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:59:34,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:34,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:59:34,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:59:34,402 INFO L87 Difference]: Start difference. First operand 1185 states and 2841 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:35,752 INFO L93 Difference]: Finished difference Result 2506 states and 6201 transitions. [2021-07-13 19:59:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:59:35,753 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:35,756 INFO L225 Difference]: With dead ends: 2506 [2021-07-13 19:59:35,756 INFO L226 Difference]: Without dead ends: 2497 [2021-07-13 19:59:35,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1198.1ms TimeCoverageRelationStatistics Valid=291, Invalid=2061, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:59:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-07-13 19:59:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1190. [2021-07-13 19:59:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 2.3994953742640877) internal successors, (2853), 1189 states have internal predecessors, (2853), 0 states have call successors, (0), 0 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 19:59:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2853 transitions. [2021-07-13 19:59:35,771 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2853 transitions. Word has length 30 [2021-07-13 19:59:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:35,771 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 2853 transitions. [2021-07-13 19:59:35,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2853 transitions. [2021-07-13 19:59:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:35,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:35,772 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] [2021-07-13 19:59:35,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:35,973 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash -739420511, now seen corresponding path program 58 times [2021-07-13 19:59:35,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:35,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625895992] [2021-07-13 19:59:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:36,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:36,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625895992] [2021-07-13 19:59:36,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625895992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:36,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992259100] [2021-07-13 19:59:36,193 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:36,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:36,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:36,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:36,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:36,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:36,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:59:36,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:36,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:36,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:36,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-07-13 19:59:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:36,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992259100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:36,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:36,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 19:59:36,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615936196] [2021-07-13 19:59:36,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:36,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:36,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:36,431 INFO L87 Difference]: Start difference. First operand 1190 states and 2853 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:59:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:37,678 INFO L93 Difference]: Finished difference Result 2587 states and 6379 transitions. [2021-07-13 19:59:37,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:59:37,679 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:59:37,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:37,682 INFO L225 Difference]: With dead ends: 2587 [2021-07-13 19:59:37,682 INFO L226 Difference]: Without dead ends: 2573 [2021-07-13 19:59:37,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 998.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:59:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-07-13 19:59:37,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 1198. [2021-07-13 19:59:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 2.4018379281537174) internal successors, (2875), 1197 states have internal predecessors, (2875), 0 states have call successors, (0), 0 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 19:59:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2875 transitions. [2021-07-13 19:59:37,698 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2875 transitions. Word has length 30 [2021-07-13 19:59:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:37,698 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 2875 transitions. [2021-07-13 19:59:37,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:59:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2875 transitions. [2021-07-13 19:59:37,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:37,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:37,700 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] [2021-07-13 19:59:37,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:37,901 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:37,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:37,901 INFO L82 PathProgramCache]: Analyzing trace with hash -203976303, now seen corresponding path program 59 times [2021-07-13 19:59:37,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:37,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012330191] [2021-07-13 19:59:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:38,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:38,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012330191] [2021-07-13 19:59:38,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012330191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:38,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90304403] [2021-07-13 19:59:38,119 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:38,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:59:38,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:38,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:38,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:38,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:38,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:38,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:38,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:38,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:59:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:38,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90304403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:38,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:38,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-13 19:59:38,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67522612] [2021-07-13 19:59:38,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:38,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:38,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:38,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:38,357 INFO L87 Difference]: Start difference. First operand 1198 states and 2875 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:39,720 INFO L93 Difference]: Finished difference Result 2599 states and 6386 transitions. [2021-07-13 19:59:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:59:39,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:39,724 INFO L225 Difference]: With dead ends: 2599 [2021-07-13 19:59:39,724 INFO L226 Difference]: Without dead ends: 2589 [2021-07-13 19:59:39,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 932.6ms TimeCoverageRelationStatistics Valid=258, Invalid=1722, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-07-13 19:59:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1198. [2021-07-13 19:59:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 2.4018379281537174) internal successors, (2875), 1197 states have internal predecessors, (2875), 0 states have call successors, (0), 0 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 19:59:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2875 transitions. [2021-07-13 19:59:39,740 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2875 transitions. Word has length 30 [2021-07-13 19:59:39,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:39,740 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 2875 transitions. [2021-07-13 19:59:39,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2875 transitions. [2021-07-13 19:59:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:39,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:39,741 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] [2021-07-13 19:59:39,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-07-13 19:59:39,942 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2108020771, now seen corresponding path program 60 times [2021-07-13 19:59:39,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:39,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008014320] [2021-07-13 19:59:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:40,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:40,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008014320] [2021-07-13 19:59:40,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008014320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:40,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691997825] [2021-07-13 19:59:40,163 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:40,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:59:40,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:40,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:59:40,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:40,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:40,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2021-07-13 19:59:40,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:40,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:40,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:40,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-07-13 19:59:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:40,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691997825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:40,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:40,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:59:40,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333766905] [2021-07-13 19:59:40,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:59:40,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:40,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:59:40,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:59:40,469 INFO L87 Difference]: Start difference. First operand 1198 states and 2875 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:59:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:42,322 INFO L93 Difference]: Finished difference Result 3071 states and 7633 transitions. [2021-07-13 19:59:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:59:42,322 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:59:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:42,326 INFO L225 Difference]: With dead ends: 3071 [2021-07-13 19:59:42,326 INFO L226 Difference]: Without dead ends: 3061 [2021-07-13 19:59:42,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1467.2ms TimeCoverageRelationStatistics Valid=444, Invalid=2312, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:59:42,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3061 states. [2021-07-13 19:59:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3061 to 1201. [2021-07-13 19:59:42,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 2.4033333333333333) internal successors, (2884), 1200 states have internal predecessors, (2884), 0 states have call successors, (0), 0 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 19:59:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 2884 transitions. [2021-07-13 19:59:42,344 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 2884 transitions. Word has length 30 [2021-07-13 19:59:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:42,344 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 2884 transitions. [2021-07-13 19:59:42,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:59:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 2884 transitions. [2021-07-13 19:59:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:42,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:42,345 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] [2021-07-13 19:59:42,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:42,546 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:42,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:42,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1491123883, now seen corresponding path program 61 times [2021-07-13 19:59:42,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:42,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167268206] [2021-07-13 19:59:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:42,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:42,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167268206] [2021-07-13 19:59:42,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167268206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:42,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357391994] [2021-07-13 19:59:42,776 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:42,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:42,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:49,936 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-07-13 19:59:49,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 64 [2021-07-13 19:59:49,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:49,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:49,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:49,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:9 [2021-07-13 19:59:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:50,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357391994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:50,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:50,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-13 19:59:50,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299126867] [2021-07-13 19:59:50,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:50,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:50,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:50,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=403, Unknown=3, NotChecked=0, Total=506 [2021-07-13 19:59:50,021 INFO L87 Difference]: Start difference. First operand 1201 states and 2884 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:58,192 INFO L93 Difference]: Finished difference Result 3139 states and 7759 transitions. [2021-07-13 20:00:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:00:58,193 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:58,198 INFO L225 Difference]: With dead ends: 3139 [2021-07-13 20:00:58,198 INFO L226 Difference]: Without dead ends: 3122 [2021-07-13 20:00:58,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 33263.1ms TimeCoverageRelationStatistics Valid=687, Invalid=3209, Unknown=10, NotChecked=0, Total=3906 [2021-07-13 20:00:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-07-13 20:00:58,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1182. [2021-07-13 20:00:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.3996613039796784) internal successors, (2834), 1181 states have internal predecessors, (2834), 0 states have call successors, (0), 0 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 20:00:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 2834 transitions. [2021-07-13 20:00:58,217 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 2834 transitions. Word has length 30 [2021-07-13 20:00:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:58,217 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 2834 transitions. [2021-07-13 20:00:58,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 2834 transitions. [2021-07-13 20:00:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:58,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:58,218 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] [2021-07-13 20:00:58,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-07-13 20:00:58,419 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:58,419 INFO L82 PathProgramCache]: Analyzing trace with hash 533757239, now seen corresponding path program 62 times [2021-07-13 20:00:58,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:58,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624682022] [2021-07-13 20:00:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:58,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:58,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624682022] [2021-07-13 20:00:58,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624682022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:58,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763800077] [2021-07-13 20:00:58,738 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:58,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:58,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:58,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:00:58,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:59,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 20:00:59,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:59,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:59,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:59,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 20:00:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:59,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763800077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:59,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:59,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:00:59,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386265658] [2021-07-13 20:00:59,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:00:59,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:59,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:00:59,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:00:59,053 INFO L87 Difference]: Start difference. First operand 1182 states and 2834 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:01,137 INFO L93 Difference]: Finished difference Result 2567 states and 6254 transitions. [2021-07-13 20:01:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:01:01,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:01,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:01,141 INFO L225 Difference]: With dead ends: 2567 [2021-07-13 20:01:01,141 INFO L226 Difference]: Without dead ends: 2550 [2021-07-13 20:01:01,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1530.4ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:01:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-07-13 20:01:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1200. [2021-07-13 20:01:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.402835696413678) internal successors, (2881), 1199 states have internal predecessors, (2881), 0 states have call successors, (0), 0 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 20:01:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2881 transitions. [2021-07-13 20:01:01,167 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2881 transitions. Word has length 30 [2021-07-13 20:01:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:01,167 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2881 transitions. [2021-07-13 20:01:01,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2881 transitions. [2021-07-13 20:01:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:01,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:01,169 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] [2021-07-13 20:01:01,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:01,385 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:01,385 INFO L82 PathProgramCache]: Analyzing trace with hash 713274679, now seen corresponding path program 63 times [2021-07-13 20:01:01,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:01,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866544155] [2021-07-13 20:01:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:01,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866544155] [2021-07-13 20:01:01,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866544155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947934715] [2021-07-13 20:01:01,712 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:01,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:01:01,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:01,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:01:01,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:02,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:02,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:02,157 INFO L354 Elim1Store]: treesize reduction 25, result has 35.9 percent of original size [2021-07-13 20:01:02,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 60 [2021-07-13 20:01:02,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:02,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:02,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:02,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:26 [2021-07-13 20:01:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:02,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947934715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:02,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:02,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-13 20:01:02,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620080932] [2021-07-13 20:01:02,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:01:02,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:02,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:01:02,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:01:02,350 INFO L87 Difference]: Start difference. First operand 1200 states and 2881 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:05,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:05,521 INFO L93 Difference]: Finished difference Result 3064 states and 7540 transitions. [2021-07-13 20:01:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:01:05,529 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:05,534 INFO L225 Difference]: With dead ends: 3064 [2021-07-13 20:01:05,534 INFO L226 Difference]: Without dead ends: 3053 [2021-07-13 20:01:05,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 2551.7ms TimeCoverageRelationStatistics Valid=564, Invalid=3342, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:01:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2021-07-13 20:01:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 1208. [2021-07-13 20:01:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.405136702568351) internal successors, (2903), 1207 states have internal predecessors, (2903), 0 states have call successors, (0), 0 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 20:01:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2903 transitions. [2021-07-13 20:01:05,552 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2903 transitions. Word has length 30 [2021-07-13 20:01:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:05,552 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2903 transitions. [2021-07-13 20:01:05,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2903 transitions. [2021-07-13 20:01:05,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:05,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:05,554 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] [2021-07-13 20:01:05,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-07-13 20:01:05,757 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:05,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1177927779, now seen corresponding path program 64 times [2021-07-13 20:01:05,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:05,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213987163] [2021-07-13 20:01:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:06,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:06,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213987163] [2021-07-13 20:01:06,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213987163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:06,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820478153] [2021-07-13 20:01:06,061 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:06,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:06,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:06,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:06,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:06,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:06,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:06,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:06,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:06,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:01:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:06,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820478153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:06,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:06,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:01:06,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125784499] [2021-07-13 20:01:06,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:06,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:06,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:06,324 INFO L87 Difference]: Start difference. First operand 1208 states and 2903 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:08,069 INFO L93 Difference]: Finished difference Result 2769 states and 6821 transitions. [2021-07-13 20:01:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:01:08,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:08,073 INFO L225 Difference]: With dead ends: 2769 [2021-07-13 20:01:08,073 INFO L226 Difference]: Without dead ends: 2756 [2021-07-13 20:01:08,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1377.5ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:01:08,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-07-13 20:01:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 1213. [2021-07-13 20:01:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.405940594059406) internal successors, (2916), 1212 states have internal predecessors, (2916), 0 states have call successors, (0), 0 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 20:01:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2916 transitions. [2021-07-13 20:01:08,090 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2916 transitions. Word has length 30 [2021-07-13 20:01:08,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:08,090 INFO L482 AbstractCegarLoop]: Abstraction has 1213 states and 2916 transitions. [2021-07-13 20:01:08,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2916 transitions. [2021-07-13 20:01:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:08,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:08,091 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] [2021-07-13 20:01:08,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:08,292 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:08,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:08,292 INFO L82 PathProgramCache]: Analyzing trace with hash 578473271, now seen corresponding path program 65 times [2021-07-13 20:01:08,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:08,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747404999] [2021-07-13 20:01:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:08,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:08,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747404999] [2021-07-13 20:01:08,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747404999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:08,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312118934] [2021-07-13 20:01:08,612 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:08,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:01:08,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:08,637 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:08,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:08,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:08,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:08,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:08,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:08,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:01:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:08,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312118934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:08,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:08,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:01:08,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621294669] [2021-07-13 20:01:08,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:08,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:08,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:08,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:08,881 INFO L87 Difference]: Start difference. First operand 1213 states and 2916 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:10,785 INFO L93 Difference]: Finished difference Result 2722 states and 6694 transitions. [2021-07-13 20:01:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:01:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:10,789 INFO L225 Difference]: With dead ends: 2722 [2021-07-13 20:01:10,789 INFO L226 Difference]: Without dead ends: 2704 [2021-07-13 20:01:10,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1489.8ms TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:01:10,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-07-13 20:01:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 1185. [2021-07-13 20:01:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 2.3994932432432434) internal successors, (2841), 1184 states have internal predecessors, (2841), 0 states have call successors, (0), 0 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 20:01:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 2841 transitions. [2021-07-13 20:01:10,806 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 2841 transitions. Word has length 30 [2021-07-13 20:01:10,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:10,806 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 2841 transitions. [2021-07-13 20:01:10,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 2841 transitions. [2021-07-13 20:01:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:10,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:10,807 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] [2021-07-13 20:01:11,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-07-13 20:01:11,009 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash 720783231, now seen corresponding path program 66 times [2021-07-13 20:01:11,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:11,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273210936] [2021-07-13 20:01:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:11,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:11,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273210936] [2021-07-13 20:01:11,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273210936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:11,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52002443] [2021-07-13 20:01:11,285 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:11,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:01:11,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:11,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:11,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:11,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 20:01:11,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:11,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:11,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:11,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 20:01:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:11,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52002443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:11,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:11,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:01:11,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768774844] [2021-07-13 20:01:11,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:11,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:11,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:11,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:11,614 INFO L87 Difference]: Start difference. First operand 1185 states and 2841 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:12,966 INFO L93 Difference]: Finished difference Result 2390 states and 5833 transitions. [2021-07-13 20:01:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:01:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:12,970 INFO L225 Difference]: With dead ends: 2390 [2021-07-13 20:01:12,970 INFO L226 Difference]: Without dead ends: 2381 [2021-07-13 20:01:12,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1124.3ms TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:01:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-07-13 20:01:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1182. [2021-07-13 20:01:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.3996613039796784) internal successors, (2834), 1181 states have internal predecessors, (2834), 0 states have call successors, (0), 0 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 20:01:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 2834 transitions. [2021-07-13 20:01:12,985 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 2834 transitions. Word has length 30 [2021-07-13 20:01:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:12,985 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 2834 transitions. [2021-07-13 20:01:12,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 2834 transitions. [2021-07-13 20:01:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:12,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:12,987 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] [2021-07-13 20:01:13,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-07-13 20:01:13,187 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:13,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1419800111, now seen corresponding path program 84 times [2021-07-13 20:01:13,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:13,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710633634] [2021-07-13 20:01:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:13,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:13,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710633634] [2021-07-13 20:01:13,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710633634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:13,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627995914] [2021-07-13 20:01:13,507 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:13,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:01:13,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:13,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:13,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:13,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:13,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:13,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:13,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:13,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 20:01:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:13,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627995914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:13,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:13,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:01:13,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321516211] [2021-07-13 20:01:13,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:13,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:13,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:13,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:13,860 INFO L87 Difference]: Start difference. First operand 1182 states and 2834 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:15,462 INFO L93 Difference]: Finished difference Result 2632 states and 6430 transitions. [2021-07-13 20:01:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:01:15,462 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:15,466 INFO L225 Difference]: With dead ends: 2632 [2021-07-13 20:01:15,466 INFO L226 Difference]: Without dead ends: 2623 [2021-07-13 20:01:15,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1031.6ms TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:01:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2623 states. [2021-07-13 20:01:15,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2623 to 1182. [2021-07-13 20:01:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.3996613039796784) internal successors, (2834), 1181 states have internal predecessors, (2834), 0 states have call successors, (0), 0 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 20:01:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 2834 transitions. [2021-07-13 20:01:15,482 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 2834 transitions. Word has length 30 [2021-07-13 20:01:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:15,482 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 2834 transitions. [2021-07-13 20:01:15,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 2834 transitions. [2021-07-13 20:01:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:15,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:15,483 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] [2021-07-13 20:01:15,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:15,684 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:15,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1811421553, now seen corresponding path program 85 times [2021-07-13 20:01:15,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:15,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412296686] [2021-07-13 20:01:15,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:15,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:15,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412296686] [2021-07-13 20:01:15,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412296686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:15,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007545256] [2021-07-13 20:01:15,997 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:16,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:16,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:16,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:16,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:16,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:16,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:16,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 20:01:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:16,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007545256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:16,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:16,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:01:16,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989435993] [2021-07-13 20:01:16,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:16,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:16,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:16,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:16,345 INFO L87 Difference]: Start difference. First operand 1182 states and 2834 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:18,231 INFO L93 Difference]: Finished difference Result 2772 states and 6749 transitions. [2021-07-13 20:01:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:01:18,232 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:18,236 INFO L225 Difference]: With dead ends: 2772 [2021-07-13 20:01:18,236 INFO L226 Difference]: Without dead ends: 2747 [2021-07-13 20:01:18,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1260.6ms TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:01:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-07-13 20:01:18,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 1200. [2021-07-13 20:01:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.4003336113427856) internal successors, (2878), 1199 states have internal predecessors, (2878), 0 states have call successors, (0), 0 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 20:01:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2878 transitions. [2021-07-13 20:01:18,252 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2878 transitions. Word has length 30 [2021-07-13 20:01:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:18,253 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2878 transitions. [2021-07-13 20:01:18,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2878 transitions. [2021-07-13 20:01:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:18,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:18,254 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] [2021-07-13 20:01:18,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable538 [2021-07-13 20:01:18,455 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:18,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1560434197, now seen corresponding path program 86 times [2021-07-13 20:01:18,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:18,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565006685] [2021-07-13 20:01:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:18,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565006685] [2021-07-13 20:01:18,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565006685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473743143] [2021-07-13 20:01:18,773 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:18,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:18,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:18,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:18,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:19,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:19,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:19,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:19,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:19,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:01:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:19,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473743143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:19,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:19,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:01:19,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619901722] [2021-07-13 20:01:19,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:19,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:19,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:19,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:19,107 INFO L87 Difference]: Start difference. First operand 1200 states and 2878 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:21,548 INFO L93 Difference]: Finished difference Result 3264 states and 8031 transitions. [2021-07-13 20:01:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:01:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:21,553 INFO L225 Difference]: With dead ends: 3264 [2021-07-13 20:01:21,553 INFO L226 Difference]: Without dead ends: 3251 [2021-07-13 20:01:21,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1676.4ms TimeCoverageRelationStatistics Valid=433, Invalid=1919, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:01:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-07-13 20:01:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 1218. [2021-07-13 20:01:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.403451109285127) internal successors, (2925), 1217 states have internal predecessors, (2925), 0 states have call successors, (0), 0 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 20:01:21,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 2925 transitions. [2021-07-13 20:01:21,580 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 2925 transitions. Word has length 30 [2021-07-13 20:01:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:21,580 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 2925 transitions. [2021-07-13 20:01:21,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 2925 transitions. [2021-07-13 20:01:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:21,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:21,581 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] [2021-07-13 20:01:21,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:21,782 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:21,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1695235605, now seen corresponding path program 87 times [2021-07-13 20:01:21,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:21,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729394367] [2021-07-13 20:01:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:22,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:22,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729394367] [2021-07-13 20:01:22,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729394367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:22,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582988611] [2021-07-13 20:01:22,075 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:22,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:01:22,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:22,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:22,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:22,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:22,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:22,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:22,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:22,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:01:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:22,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582988611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:22,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:22,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:01:22,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659553962] [2021-07-13 20:01:22,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:22,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:22,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:22,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:22,383 INFO L87 Difference]: Start difference. First operand 1218 states and 2925 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:24,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:24,223 INFO L93 Difference]: Finished difference Result 2806 states and 6889 transitions. [2021-07-13 20:01:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:01:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:24,228 INFO L225 Difference]: With dead ends: 2806 [2021-07-13 20:01:24,228 INFO L226 Difference]: Without dead ends: 2789 [2021-07-13 20:01:24,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1240.4ms TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:01:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-07-13 20:01:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 1204. [2021-07-13 20:01:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 2.399833748960931) internal successors, (2887), 1203 states have internal predecessors, (2887), 0 states have call successors, (0), 0 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 20:01:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 2887 transitions. [2021-07-13 20:01:24,253 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 2887 transitions. Word has length 30 [2021-07-13 20:01:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:24,253 INFO L482 AbstractCegarLoop]: Abstraction has 1204 states and 2887 transitions. [2021-07-13 20:01:24,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 2887 transitions. [2021-07-13 20:01:24,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:24,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:24,255 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] [2021-07-13 20:01:24,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:24,458 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:24,459 INFO L82 PathProgramCache]: Analyzing trace with hash 103022281, now seen corresponding path program 88 times [2021-07-13 20:01:24,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:24,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924700009] [2021-07-13 20:01:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:24,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:24,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924700009] [2021-07-13 20:01:24,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924700009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:24,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584654452] [2021-07-13 20:01:24,809 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:24,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:24,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:24,834 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:24,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:25,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:25,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:25,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:25,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:25,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 20:01:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:25,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584654452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:25,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:25,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:01:25,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470412243] [2021-07-13 20:01:25,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:25,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:25,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:25,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:25,130 INFO L87 Difference]: Start difference. First operand 1204 states and 2887 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:26,894 INFO L93 Difference]: Finished difference Result 2692 states and 6558 transitions. [2021-07-13 20:01:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:01:26,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:26,898 INFO L225 Difference]: With dead ends: 2692 [2021-07-13 20:01:26,899 INFO L226 Difference]: Without dead ends: 2673 [2021-07-13 20:01:26,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1221.1ms TimeCoverageRelationStatistics Valid=291, Invalid=1191, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:01:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2021-07-13 20:01:26,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 1185. [2021-07-13 20:01:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 2.3994932432432434) internal successors, (2841), 1184 states have internal predecessors, (2841), 0 states have call successors, (0), 0 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 20:01:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 2841 transitions. [2021-07-13 20:01:26,918 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 2841 transitions. Word has length 30 [2021-07-13 20:01:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:26,918 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 2841 transitions. [2021-07-13 20:01:26,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 2841 transitions. [2021-07-13 20:01:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:26,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:26,920 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] [2021-07-13 20:01:27,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-07-13 20:01:27,123 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:27,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1677306459, now seen corresponding path program 89 times [2021-07-13 20:01:27,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:27,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602329275] [2021-07-13 20:01:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:27,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:27,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602329275] [2021-07-13 20:01:27,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602329275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:27,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614839258] [2021-07-13 20:01:27,429 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:27,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:01:27,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:27,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:27,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:27,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:27,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:27,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:27,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:27,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 20:01:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:27,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614839258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:27,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:27,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:01:27,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401972348] [2021-07-13 20:01:27,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:27,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:27,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:27,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:27,784 INFO L87 Difference]: Start difference. First operand 1185 states and 2841 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:29,069 INFO L93 Difference]: Finished difference Result 2600 states and 6353 transitions. [2021-07-13 20:01:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:01:29,069 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:29,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:29,073 INFO L225 Difference]: With dead ends: 2600 [2021-07-13 20:01:29,073 INFO L226 Difference]: Without dead ends: 2591 [2021-07-13 20:01:29,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1003.5ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:01:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-07-13 20:01:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1182. [2021-07-13 20:01:29,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.3996613039796784) internal successors, (2834), 1181 states have internal predecessors, (2834), 0 states have call successors, (0), 0 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 20:01:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 2834 transitions. [2021-07-13 20:01:29,089 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 2834 transitions. Word has length 30 [2021-07-13 20:01:29,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:29,089 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 2834 transitions. [2021-07-13 20:01:29,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:29,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 2834 transitions. [2021-07-13 20:01:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:29,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:29,090 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] [2021-07-13 20:01:29,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:29,291 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1600223437, now seen corresponding path program 90 times [2021-07-13 20:01:29,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:29,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849290607] [2021-07-13 20:01:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:29,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:29,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849290607] [2021-07-13 20:01:29,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849290607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:29,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369811376] [2021-07-13 20:01:29,621 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:29,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:01:29,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:29,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:01:29,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:29,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:30,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:30,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 20:01:30,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:30,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:30,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:30,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:38 [2021-07-13 20:01:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:30,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369811376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:30,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:30,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-13 20:01:30,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965945154] [2021-07-13 20:01:30,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:01:30,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:01:30,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:01:30,229 INFO L87 Difference]: Start difference. First operand 1182 states and 2834 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:30,873 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-07-13 20:01:31,368 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-07-13 20:01:31,518 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-07-13 20:01:31,659 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-07-13 20:01:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:34,088 INFO L93 Difference]: Finished difference Result 2827 states and 6902 transitions. [2021-07-13 20:01:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:01:34,088 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:34,092 INFO L225 Difference]: With dead ends: 2827 [2021-07-13 20:01:34,092 INFO L226 Difference]: Without dead ends: 2806 [2021-07-13 20:01:34,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 3160.5ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:01:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2021-07-13 20:01:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 1199. [2021-07-13 20:01:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 2.4006677796327214) internal successors, (2876), 1198 states have internal predecessors, (2876), 0 states have call successors, (0), 0 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 20:01:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 2876 transitions. [2021-07-13 20:01:34,115 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 2876 transitions. Word has length 30 [2021-07-13 20:01:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:34,115 INFO L482 AbstractCegarLoop]: Abstraction has 1199 states and 2876 transitions. [2021-07-13 20:01:34,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 2876 transitions. [2021-07-13 20:01:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:34,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:34,116 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] [2021-07-13 20:01:34,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-07-13 20:01:34,319 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:34,319 INFO L82 PathProgramCache]: Analyzing trace with hash -24447437, now seen corresponding path program 91 times [2021-07-13 20:01:34,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:34,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608655584] [2021-07-13 20:01:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:34,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:34,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608655584] [2021-07-13 20:01:34,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608655584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:34,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396915384] [2021-07-13 20:01:34,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:34,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:34,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:34,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:34,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:34,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:34,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:34,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:01:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:34,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396915384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:34,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:34,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:01:34,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142258376] [2021-07-13 20:01:34,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:34,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:34,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:34,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:34,953 INFO L87 Difference]: Start difference. First operand 1199 states and 2876 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:38,268 INFO L93 Difference]: Finished difference Result 3247 states and 7982 transitions. [2021-07-13 20:01:38,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:01:38,268 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:38,273 INFO L225 Difference]: With dead ends: 3247 [2021-07-13 20:01:38,273 INFO L226 Difference]: Without dead ends: 3232 [2021-07-13 20:01:38,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 2436.8ms TimeCoverageRelationStatistics Valid=613, Invalid=3047, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:01:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-07-13 20:01:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1234. [2021-07-13 20:01:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.40470397404704) internal successors, (2965), 1233 states have internal predecessors, (2965), 0 states have call successors, (0), 0 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 20:01:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 2965 transitions. [2021-07-13 20:01:38,290 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 2965 transitions. Word has length 30 [2021-07-13 20:01:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:38,290 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 2965 transitions. [2021-07-13 20:01:38,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:38,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 2965 transitions. [2021-07-13 20:01:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:38,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:38,292 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] [2021-07-13 20:01:38,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:38,492 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:38,493 INFO L82 PathProgramCache]: Analyzing trace with hash -159248845, now seen corresponding path program 92 times [2021-07-13 20:01:38,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:38,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384493783] [2021-07-13 20:01:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:38,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:38,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384493783] [2021-07-13 20:01:38,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384493783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:38,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39476373] [2021-07-13 20:01:38,833 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:38,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:38,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:38,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:39,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:39,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 20:01:39,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:39,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:39,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:39,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-07-13 20:01:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:39,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39476373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:39,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:39,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:01:39,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682251951] [2021-07-13 20:01:39,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:39,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:39,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:39,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:39,143 INFO L87 Difference]: Start difference. First operand 1234 states and 2965 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:41,345 INFO L93 Difference]: Finished difference Result 2742 states and 6720 transitions. [2021-07-13 20:01:41,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:01:41,346 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:41,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:41,350 INFO L225 Difference]: With dead ends: 2742 [2021-07-13 20:01:41,350 INFO L226 Difference]: Without dead ends: 2725 [2021-07-13 20:01:41,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1576.1ms TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:01:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-07-13 20:01:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1223. [2021-07-13 20:01:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1222 states have (on average 2.402618657937807) internal successors, (2936), 1222 states have internal predecessors, (2936), 0 states have call successors, (0), 0 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 20:01:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 2936 transitions. [2021-07-13 20:01:41,367 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 2936 transitions. Word has length 30 [2021-07-13 20:01:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:41,367 INFO L482 AbstractCegarLoop]: Abstraction has 1223 states and 2936 transitions. [2021-07-13 20:01:41,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:41,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 2936 transitions. [2021-07-13 20:01:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:41,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:41,369 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] [2021-07-13 20:01:41,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:41,569 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:41,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:41,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1639009041, now seen corresponding path program 93 times [2021-07-13 20:01:41,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:41,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934155673] [2021-07-13 20:01:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:41,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:41,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934155673] [2021-07-13 20:01:41,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934155673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:41,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288976732] [2021-07-13 20:01:41,937 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:41,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:01:41,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:41,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:41,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:42,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:42,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:42,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:42,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:42,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 20:01:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:42,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288976732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:42,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:42,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:01:42,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645000665] [2021-07-13 20:01:42,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:42,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:42,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:42,276 INFO L87 Difference]: Start difference. First operand 1223 states and 2936 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:44,809 INFO L93 Difference]: Finished difference Result 2596 states and 6348 transitions. [2021-07-13 20:01:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:01:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:44,814 INFO L225 Difference]: With dead ends: 2596 [2021-07-13 20:01:44,814 INFO L226 Difference]: Without dead ends: 2577 [2021-07-13 20:01:44,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1823.2ms TimeCoverageRelationStatistics Valid=392, Invalid=1770, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:01:44,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-07-13 20:01:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 1211. [2021-07-13 20:01:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 2.4041322314049585) internal successors, (2909), 1210 states have internal predecessors, (2909), 0 states have call successors, (0), 0 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 20:01:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 2909 transitions. [2021-07-13 20:01:44,830 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 2909 transitions. Word has length 30 [2021-07-13 20:01:44,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:44,830 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 2909 transitions. [2021-07-13 20:01:44,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 2909 transitions. [2021-07-13 20:01:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:44,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:44,831 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] [2021-07-13 20:01:45,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:45,032 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:45,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:45,032 INFO L82 PathProgramCache]: Analyzing trace with hash 448898545, now seen corresponding path program 94 times [2021-07-13 20:01:45,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:45,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764751861] [2021-07-13 20:01:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:45,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:45,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764751861] [2021-07-13 20:01:45,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764751861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:45,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222700143] [2021-07-13 20:01:45,378 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:45,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:45,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:45,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:45,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:45,650 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-07-13 20:01:45,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 64 [2021-07-13 20:01:45,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:45,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:45,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:45,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:9 [2021-07-13 20:01:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:45,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222700143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:45,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:45,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 20:01:45,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828124285] [2021-07-13 20:01:45,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:01:45,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:01:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:01:45,701 INFO L87 Difference]: Start difference. First operand 1211 states and 2909 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 20:01:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:48,661 INFO L93 Difference]: Finished difference Result 3316 states and 8224 transitions. [2021-07-13 20:01:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:01:48,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 20:01:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:48,666 INFO L225 Difference]: With dead ends: 3316 [2021-07-13 20:01:48,666 INFO L226 Difference]: Without dead ends: 3303 [2021-07-13 20:01:48,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2237.9ms TimeCoverageRelationStatistics Valid=491, Invalid=2265, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:01:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2021-07-13 20:01:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 1234. [2021-07-13 20:01:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.4071370640713705) internal successors, (2968), 1233 states have internal predecessors, (2968), 0 states have call successors, (0), 0 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 20:01:48,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 2968 transitions. [2021-07-13 20:01:48,685 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 2968 transitions. Word has length 30 [2021-07-13 20:01:48,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:48,685 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 2968 transitions. [2021-07-13 20:01:48,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 20:01:48,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 2968 transitions. [2021-07-13 20:01:48,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:48,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:48,686 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] [2021-07-13 20:01:48,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-07-13 20:01:48,887 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:48,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:48,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2089667701, now seen corresponding path program 95 times [2021-07-13 20:01:48,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:48,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357649328] [2021-07-13 20:01:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:49,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:49,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357649328] [2021-07-13 20:01:49,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357649328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:49,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953229889] [2021-07-13 20:01:49,381 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:49,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:01:49,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:49,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:49,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:49,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:49,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:49,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:49,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:49,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:01:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:49,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953229889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:49,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:49,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 20:01:49,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743419859] [2021-07-13 20:01:49,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:01:49,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:49,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:01:49,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:01:49,724 INFO L87 Difference]: Start difference. First operand 1234 states and 2968 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 20:01:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:52,511 INFO L93 Difference]: Finished difference Result 2946 states and 7279 transitions. [2021-07-13 20:01:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:01:52,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 20:01:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:52,516 INFO L225 Difference]: With dead ends: 2946 [2021-07-13 20:01:52,516 INFO L226 Difference]: Without dead ends: 2929 [2021-07-13 20:01:52,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2133.6ms TimeCoverageRelationStatistics Valid=400, Invalid=1952, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:01:52,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2021-07-13 20:01:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 1223. [2021-07-13 20:01:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1222 states have (on average 2.4058919803600656) internal successors, (2940), 1222 states have internal predecessors, (2940), 0 states have call successors, (0), 0 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 20:01:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 2940 transitions. [2021-07-13 20:01:52,538 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 2940 transitions. Word has length 30 [2021-07-13 20:01:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:52,538 INFO L482 AbstractCegarLoop]: Abstraction has 1223 states and 2940 transitions. [2021-07-13 20:01:52,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 20:01:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 2940 transitions. [2021-07-13 20:01:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:52,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:52,539 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] [2021-07-13 20:01:52,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:52,740 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:52,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:52,740 INFO L82 PathProgramCache]: Analyzing trace with hash -560713633, now seen corresponding path program 96 times [2021-07-13 20:01:52,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:52,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808141339] [2021-07-13 20:01:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:53,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:53,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808141339] [2021-07-13 20:01:53,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808141339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:53,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361668908] [2021-07-13 20:01:53,087 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:53,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:01:53,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:53,112 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:53,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 20:01:53,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:53,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:53,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:53,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-07-13 20:01:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:53,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361668908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:53,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:53,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:01:53,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475599674] [2021-07-13 20:01:53,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:53,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:53,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:53,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:53,445 INFO L87 Difference]: Start difference. First operand 1223 states and 2940 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:55,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:55,880 INFO L93 Difference]: Finished difference Result 2601 states and 6401 transitions. [2021-07-13 20:01:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:01:55,881 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:55,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:55,885 INFO L225 Difference]: With dead ends: 2601 [2021-07-13 20:01:55,885 INFO L226 Difference]: Without dead ends: 2591 [2021-07-13 20:01:55,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1519.2ms TimeCoverageRelationStatistics Valid=270, Invalid=1622, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:01:55,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-07-13 20:01:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1214. [2021-07-13 20:01:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 2.403957131079967) internal successors, (2916), 1213 states have internal predecessors, (2916), 0 states have call successors, (0), 0 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 20:01:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2916 transitions. [2021-07-13 20:01:55,902 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2916 transitions. Word has length 30 [2021-07-13 20:01:55,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:55,902 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 2916 transitions. [2021-07-13 20:01:55,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2916 transitions. [2021-07-13 20:01:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:55,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:55,903 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] [2021-07-13 20:01:56,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-07-13 20:01:56,104 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:56,104 INFO L82 PathProgramCache]: Analyzing trace with hash 513532051, now seen corresponding path program 97 times [2021-07-13 20:01:56,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:56,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72173281] [2021-07-13 20:01:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:56,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:56,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72173281] [2021-07-13 20:01:56,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72173281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:56,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457249839] [2021-07-13 20:01:56,490 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:56,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:56,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:56,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:56,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:56,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:56,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:56,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:01:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:56,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457249839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:56,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:56,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 20:01:56,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426498444] [2021-07-13 20:01:56,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:01:56,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:56,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:01:56,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:01:56,810 INFO L87 Difference]: Start difference. First operand 1214 states and 2916 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 20:01:59,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:59,054 INFO L93 Difference]: Finished difference Result 2861 states and 7062 transitions. [2021-07-13 20:01:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:01:59,054 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 20:01:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:59,058 INFO L225 Difference]: With dead ends: 2861 [2021-07-13 20:01:59,058 INFO L226 Difference]: Without dead ends: 2848 [2021-07-13 20:01:59,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1725.2ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:01:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-07-13 20:01:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 1228. [2021-07-13 20:01:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.4050529747351264) internal successors, (2951), 1227 states have internal predecessors, (2951), 0 states have call successors, (0), 0 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 20:01:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 2951 transitions. [2021-07-13 20:01:59,077 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 2951 transitions. Word has length 30 [2021-07-13 20:01:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:59,077 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 2951 transitions. [2021-07-13 20:01:59,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 20:01:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 2951 transitions. [2021-07-13 20:01:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:59,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:59,078 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] [2021-07-13 20:01:59,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-07-13 20:01:59,278 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:59,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:59,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2025034195, now seen corresponding path program 98 times [2021-07-13 20:01:59,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:59,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453338237] [2021-07-13 20:01:59,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:59,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:59,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453338237] [2021-07-13 20:01:59,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453338237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:59,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824430247] [2021-07-13 20:01:59,643 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:59,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:59,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:59,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:59,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:59,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:59,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:59,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:59,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:59,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:01:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:59,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824430247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:59,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:59,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 20:01:59,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085967171] [2021-07-13 20:01:59,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:01:59,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:59,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:01:59,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:01:59,940 INFO L87 Difference]: Start difference. First operand 1228 states and 2951 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 20:02:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:01,817 INFO L93 Difference]: Finished difference Result 2622 states and 6434 transitions. [2021-07-13 20:02:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:02:01,818 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 20:02:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:01,822 INFO L225 Difference]: With dead ends: 2622 [2021-07-13 20:02:01,822 INFO L226 Difference]: Without dead ends: 2605 [2021-07-13 20:02:01,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1470.8ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:02:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-07-13 20:02:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1217. [2021-07-13 20:02:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.4029605263157894) internal successors, (2922), 1216 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 20:02:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 2922 transitions. [2021-07-13 20:02:01,839 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 2922 transitions. Word has length 30 [2021-07-13 20:02:01,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:01,839 INFO L482 AbstractCegarLoop]: Abstraction has 1217 states and 2922 transitions. [2021-07-13 20:02:01,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 20:02:01,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 2922 transitions. [2021-07-13 20:02:01,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:01,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:01,840 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] [2021-07-13 20:02:02,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:02,041 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:02,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:02,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1111053703, now seen corresponding path program 99 times [2021-07-13 20:02:02,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:02,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520604557] [2021-07-13 20:02:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:02,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:02,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520604557] [2021-07-13 20:02:02,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520604557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:02,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838564958] [2021-07-13 20:02:02,401 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:02,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:02:02,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:02,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:02,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:02,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:02,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 20:02:02,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:02,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:02,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:02,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:92 [2021-07-13 20:02:03,169 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-07-13 20:02:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:03,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838564958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:03,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:03,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-13 20:02:03,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650756970] [2021-07-13 20:02:03,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:02:03,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:03,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:02:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:02:03,218 INFO L87 Difference]: Start difference. First operand 1217 states and 2922 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:03,477 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 20:02:04,033 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-07-13 20:02:04,241 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-07-13 20:02:04,734 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-07-13 20:02:04,924 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-07-13 20:02:05,806 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-07-13 20:02:06,045 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-07-13 20:02:06,614 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-07-13 20:02:07,113 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-07-13 20:02:07,695 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-07-13 20:02:08,128 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-07-13 20:02:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:08,558 INFO L93 Difference]: Finished difference Result 2717 states and 6621 transitions. [2021-07-13 20:02:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:02:08,559 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:08,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:08,563 INFO L225 Difference]: With dead ends: 2717 [2021-07-13 20:02:08,563 INFO L226 Difference]: Without dead ends: 2701 [2021-07-13 20:02:08,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 4784.7ms TimeCoverageRelationStatistics Valid=718, Invalid=3838, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:02:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-07-13 20:02:08,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 1215. [2021-07-13 20:02:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.4028006589785833) internal successors, (2917), 1214 states have internal predecessors, (2917), 0 states have call successors, (0), 0 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 20:02:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2917 transitions. [2021-07-13 20:02:08,589 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2917 transitions. Word has length 30 [2021-07-13 20:02:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:08,589 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 2917 transitions. [2021-07-13 20:02:08,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2917 transitions. [2021-07-13 20:02:08,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:08,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:08,590 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] [2021-07-13 20:02:08,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-07-13 20:02:08,791 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:08,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:08,791 INFO L82 PathProgramCache]: Analyzing trace with hash -873028603, now seen corresponding path program 100 times [2021-07-13 20:02:08,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:08,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150144971] [2021-07-13 20:02:08,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:09,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:09,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150144971] [2021-07-13 20:02:09,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150144971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:09,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751452021] [2021-07-13 20:02:09,121 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:09,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:09,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:09,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:02:09,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:09,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:02:09,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:09,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:09,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:09,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 20:02:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:09,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751452021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:09,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:09,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:02:09,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206546390] [2021-07-13 20:02:09,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:02:09,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:09,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:02:09,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:02:09,465 INFO L87 Difference]: Start difference. First operand 1215 states and 2917 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:11,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:11,642 INFO L93 Difference]: Finished difference Result 2817 states and 6859 transitions. [2021-07-13 20:02:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:02:11,642 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:11,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:11,646 INFO L225 Difference]: With dead ends: 2817 [2021-07-13 20:02:11,646 INFO L226 Difference]: Without dead ends: 2792 [2021-07-13 20:02:11,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1727.8ms TimeCoverageRelationStatistics Valid=356, Invalid=1536, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:02:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-07-13 20:02:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 1233. [2021-07-13 20:02:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.403409090909091) internal successors, (2961), 1232 states have internal predecessors, (2961), 0 states have call successors, (0), 0 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 20:02:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2961 transitions. [2021-07-13 20:02:11,663 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2961 transitions. Word has length 30 [2021-07-13 20:02:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:11,663 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 2961 transitions. [2021-07-13 20:02:11,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2961 transitions. [2021-07-13 20:02:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:11,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:11,664 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] [2021-07-13 20:02:11,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-07-13 20:02:11,865 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash 702747397, now seen corresponding path program 101 times [2021-07-13 20:02:11,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:11,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213326679] [2021-07-13 20:02:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:12,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:12,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213326679] [2021-07-13 20:02:12,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213326679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:12,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391355762] [2021-07-13 20:02:12,179 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:12,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:02:12,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:12,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:02:12,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:30,901 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-07-13 20:02:30,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 64 [2021-07-13 20:02:30,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:30,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:30,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:30,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:9 [2021-07-13 20:02:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:30,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391355762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:30,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:30,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:02:30,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455422266] [2021-07-13 20:02:30,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:02:30,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:30,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:02:30,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=436, Unknown=5, NotChecked=0, Total=552 [2021-07-13 20:02:30,991 INFO L87 Difference]: Start difference. First operand 1233 states and 2961 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-13 20:03:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:03:55,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-07-13 20:03:55,344 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:03:55,347 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:03:55,348 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:03:55,348 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:03:55 BasicIcfg [2021-07-13 20:03:55,348 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:03:55,349 INFO L168 Benchmark]: Toolchain (without parser) took 790384.02 ms. Allocated memory was 210.8 MB in the beginning and 367.0 MB in the end (delta: 156.2 MB). Free memory was 191.2 MB in the beginning and 168.7 MB in the end (delta: 22.5 MB). Peak memory consumption was 179.8 MB. Max. memory is 8.0 GB. [2021-07-13 20:03:55,349 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 210.8 MB. Free memory is still 192.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:03:55,349 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.94 ms. Allocated memory is still 210.8 MB. Free memory was 191.0 MB in the beginning and 189.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:03:55,349 INFO L168 Benchmark]: Boogie Preprocessor took 20.30 ms. Allocated memory is still 210.8 MB. Free memory was 189.5 MB in the beginning and 188.6 MB in the end (delta: 897.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:03:55,349 INFO L168 Benchmark]: RCFGBuilder took 245.61 ms. Allocated memory is still 210.8 MB. Free memory was 188.4 MB in the beginning and 176.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:03:55,349 INFO L168 Benchmark]: TraceAbstraction took 790087.74 ms. Allocated memory was 210.8 MB in the beginning and 367.0 MB in the end (delta: 156.2 MB). Free memory was 176.3 MB in the beginning and 168.7 MB in the end (delta: 7.6 MB). Peak memory consumption was 164.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:03:55,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 210.8 MB. Free memory is still 192.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.94 ms. Allocated memory is still 210.8 MB. Free memory was 191.0 MB in the beginning and 189.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.30 ms. Allocated memory is still 210.8 MB. Free memory was 189.5 MB in the beginning and 188.6 MB in the end (delta: 897.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 245.61 ms. Allocated memory is still 210.8 MB. Free memory was 188.4 MB in the beginning and 176.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 790087.74 ms. Allocated memory was 210.8 MB in the beginning and 367.0 MB in the end (delta: 156.2 MB). Free memory was 176.3 MB in the beginning and 168.7 MB in the end (delta: 7.6 MB). Peak memory consumption was 164.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1233states) and FLOYD_HOARE automaton (currently 21 states, 24 states before enhancement),while ReachableStatesComputation was computing reachable states (140 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 789959.2ms, OverallIterations: 269, TraceHistogramMax: 2, EmptinessCheckTime: 336.6ms, AutomataDifference: 565435.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7696 SDtfs, 69730 SDslu, 57232 SDs, 0 SdLazy, 316717 SolverSat, 35200 SolverUnsat, 29 SolverUnknown, 0 SolverNotchecked, 262336.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17123 GetRequests, 5379 SyntacticMatches, 887 SemanticMatches, 10857 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143792 ImplicationChecksByTransitivity, 387258.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1234occurred in iteration=259, InterpolantAutomatonStates: 8798, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4254.3ms AutomataMinimizationTime, 268 MinimizatonAttempts, 363605 StatesRemovedByMinimization, 268 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 800.9ms SsaConstructionTime, 2429.5ms SatisfiabilityAnalysisTime, 156882.0ms InterpolantComputationTime, 15626 NumberOfCodeBlocks, 15626 NumberOfCodeBlocksAsserted, 925 NumberOfCheckSat, 15090 ConstructedInterpolants, 125 QuantifiedInterpolants, 323657 SizeOfPredicates, 1940 NumberOfNonLiveVariables, 16186 ConjunctsInSsa, 7948 ConjunctsInUnsatCore, 536 InterpolantComputations, 2 PerfectInterpolantSequences, 89/5811 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown