/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 04:26:37,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 04:26:37,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 04:26:37,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 04:26:37,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-15 04:26:37,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-15 04:26:37,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-15 04:26:37,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-15 04:26:37,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-15 04:26:37,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-15 04:26:37,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-15 04:26:37,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-15 04:26:37,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 04:26:37,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 04:26:37,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 04:26:37,565 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 [2021-04-15 04:26:37,588 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 04:26:37,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 04:26:37,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 04:26:37,589 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 04:26:37,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 04:26:37,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 04:26:37,591 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 04:26:37,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 04:26:37,592 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 04:26:37,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 04:26:37,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 04:26:37,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 04:26:37,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 04:26:37,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 04:26:37,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 04:26:37,593 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 04:26:37,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 04:26:37,594 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 04:26:37,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 04:26:37,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 04:26:37,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 04:26:37,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 04:26:37,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 04:26:37,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 04:26:37,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 04:26:37,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 04:26:37,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 04:26:37,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 04:26:37,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 04:26:37,596 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 04:26:37,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 04:26:37,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 04:26:37,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 04:26:38,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 04:26:38,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 04:26:38,010 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 04:26:38,017 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 04:26:38,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl [2021-04-15 04:26:38,039 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl' [2021-04-15 04:26:38,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 04:26:38,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 04:26:38,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 04:26:38,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 04:26:38,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 04:26:38,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:26:38" (1/1) ... [2021-04-15 04:26:38,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:26:38" (1/1) ... [2021-04-15 04:26:38,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 04:26:38,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 04:26:38,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 04:26:38,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 04:26:38,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:26:38" (1/1) ... [2021-04-15 04:26:38,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:26:38" (1/1) ... [2021-04-15 04:26:38,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:26:38" (1/1) ... [2021-04-15 04:26:38,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:26:38" (1/1) ... [2021-04-15 04:26:38,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:26:38" (1/1) ... [2021-04-15 04:26:38,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:26:38" (1/1) ... [2021-04-15 04:26:38,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:26:38" (1/1) ... [2021-04-15 04:26:38,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 04:26:38,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 04:26:38,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 04:26:38,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 04:26:38,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:26:38" (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 [2021-04-15 04:26:38,264 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 04:26:38,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 04:26:38,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 04:26:38,265 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 04:26:38,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 04:26:38,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 04:26:38,265 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 04:26:38,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 04:26:38,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 04:26:38,266 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 04:26:38,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 04:26:38,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 04:26:38,266 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-04-15 04:26:38,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-04-15 04:26:38,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-04-15 04:26:38,268 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 04:26:38,648 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 04:26:38,648 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 04:26:38,651 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:26:38 BoogieIcfgContainer [2021-04-15 04:26:38,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 04:26:38,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 04:26:38,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 04:26:38,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 04:26:38,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:26:38" (1/2) ... [2021-04-15 04:26:38,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a0f700 and model type buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:26:38, skipping insertion in model container [2021-04-15 04:26:38,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:26:38" (2/2) ... [2021-04-15 04:26:38,678 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult-alt.wvr.bpl [2021-04-15 04:26:38,684 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 04:26:38,685 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 04:26:38,689 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 04:26:38,690 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 04:26:38,798 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-04-15 04:26:38,819 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-04-15 04:26:38,839 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 04:26:38,839 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 04:26:38,839 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 04:26:38,839 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 04:26:38,840 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 04:26:38,840 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 04:26:38,840 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 04:26:38,840 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 04:26:38,854 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-04-15 04:26:38,930 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 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) [2021-04-15 04:26:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 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) [2021-04-15 04:26:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 04:26:38,966 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:38,968 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:38,968 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:38,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:38,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1014933584, now seen corresponding path program 1 times [2021-04-15 04:26:38,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:38,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861254542] [2021-04-15 04:26:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:39,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861254542] [2021-04-15 04:26:39,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:26:39,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 04:26:39,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130654224] [2021-04-15 04:26:39,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 04:26:39,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 04:26:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:26:39,234 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 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) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:39,290 INFO L93 Difference]: Finished difference Result 691 states and 2633 transitions. [2021-04-15 04:26:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:26:39,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 04:26:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:39,316 INFO L225 Difference]: With dead ends: 691 [2021-04-15 04:26:39,316 INFO L226 Difference]: Without dead ends: 691 [2021-04-15 04:26:39,318 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:26:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-04-15 04:26:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2021-04-15 04:26:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.815942028985507) internal successors, (2633), 690 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2633 transitions. [2021-04-15 04:26:39,425 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2633 transitions. Word has length 19 [2021-04-15 04:26:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:39,425 INFO L480 AbstractCegarLoop]: Abstraction has 691 states and 2633 transitions. [2021-04-15 04:26:39,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2633 transitions. [2021-04-15 04:26:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:26:39,430 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:39,430 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:39,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 04:26:39,431 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:39,432 INFO L82 PathProgramCache]: Analyzing trace with hash 810519764, now seen corresponding path program 1 times [2021-04-15 04:26:39,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:39,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917252959] [2021-04-15 04:26:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:39,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917252959] [2021-04-15 04:26:39,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026993425] [2021-04-15 04:26:39,481 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 [2021-04-15 04:26:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:39,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 04:26:39,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:39,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 04:26:39,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-04-15 04:26:39,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220185883] [2021-04-15 04:26:39,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:26:39,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:39,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:26:39,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:26:39,744 INFO L87 Difference]: Start difference. First operand 691 states and 2633 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:39,801 INFO L93 Difference]: Finished difference Result 1250 states and 4705 transitions. [2021-04-15 04:26:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:26:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 04:26:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:39,818 INFO L225 Difference]: With dead ends: 1250 [2021-04-15 04:26:39,819 INFO L226 Difference]: Without dead ends: 1250 [2021-04-15 04:26:39,819 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:26:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-04-15 04:26:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 815. [2021-04-15 04:26:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.839066339066339) internal successors, (3125), 814 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 3125 transitions. [2021-04-15 04:26:39,870 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 3125 transitions. Word has length 22 [2021-04-15 04:26:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:39,871 INFO L480 AbstractCegarLoop]: Abstraction has 815 states and 3125 transitions. [2021-04-15 04:26:39,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:39,871 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 3125 transitions. [2021-04-15 04:26:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:26:39,879 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:39,880 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:40,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 04:26:40,097 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:40,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash 234896854, now seen corresponding path program 1 times [2021-04-15 04:26:40,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:40,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513996094] [2021-04-15 04:26:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:40,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513996094] [2021-04-15 04:26:40,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776347477] [2021-04-15 04:26:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:40,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 04:26:40,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:40,532 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 [2021-04-15 04:26:40,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:26:40,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:26:40,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:26:40,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-04-15 04:26:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:40,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:40,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-04-15 04:26:40,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893819233] [2021-04-15 04:26:40,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 04:26:40,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:40,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 04:26:40,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:26:40,603 INFO L87 Difference]: Start difference. First operand 815 states and 3125 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-04-15 04:26:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:40,718 INFO L93 Difference]: Finished difference Result 1934 states and 7455 transitions. [2021-04-15 04:26:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 04:26:40,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 24 [2021-04-15 04:26:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:40,736 INFO L225 Difference]: With dead ends: 1934 [2021-04-15 04:26:40,736 INFO L226 Difference]: Without dead ends: 1807 [2021-04-15 04:26:40,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:26:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-04-15 04:26:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1306. [2021-04-15 04:26:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8521072796934868) internal successors, (5027), 1305 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5027 transitions. [2021-04-15 04:26:40,811 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5027 transitions. Word has length 24 [2021-04-15 04:26:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:40,812 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 5027 transitions. [2021-04-15 04:26:40,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-04-15 04:26:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5027 transitions. [2021-04-15 04:26:40,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:26:40,819 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:40,819 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:41,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:41,025 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1112061528, now seen corresponding path program 2 times [2021-04-15 04:26:41,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:41,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143012634] [2021-04-15 04:26:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:41,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143012634] [2021-04-15 04:26:41,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303666565] [2021-04-15 04:26:41,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:41,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:26:41,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:41,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 04:26:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:41,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:41,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-04-15 04:26:41,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024157339] [2021-04-15 04:26:41,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 04:26:41,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:41,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 04:26:41,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:26:41,286 INFO L87 Difference]: Start difference. First operand 1306 states and 5027 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:41,384 INFO L93 Difference]: Finished difference Result 2404 states and 8959 transitions. [2021-04-15 04:26:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:26:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:26:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:41,406 INFO L225 Difference]: With dead ends: 2404 [2021-04-15 04:26:41,406 INFO L226 Difference]: Without dead ends: 2234 [2021-04-15 04:26:41,406 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:26:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-04-15 04:26:41,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1906. [2021-04-15 04:26:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.859317585301837) internal successors, (7352), 1905 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7352 transitions. [2021-04-15 04:26:41,530 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7352 transitions. Word has length 26 [2021-04-15 04:26:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:41,531 INFO L480 AbstractCegarLoop]: Abstraction has 1906 states and 7352 transitions. [2021-04-15 04:26:41,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7352 transitions. [2021-04-15 04:26:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:26:41,541 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:41,541 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:41,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:41,757 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:41,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1469512084, now seen corresponding path program 1 times [2021-04-15 04:26:41,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:41,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302374001] [2021-04-15 04:26:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:26:41,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302374001] [2021-04-15 04:26:41,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:26:41,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:26:41,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095411690] [2021-04-15 04:26:41,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:26:41,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:41,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:26:41,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:26:41,811 INFO L87 Difference]: Start difference. First operand 1906 states and 7352 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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) [2021-04-15 04:26:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:41,871 INFO L93 Difference]: Finished difference Result 3426 states and 12683 transitions. [2021-04-15 04:26:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:26:41,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:26:41,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:41,904 INFO L225 Difference]: With dead ends: 3426 [2021-04-15 04:26:41,904 INFO L226 Difference]: Without dead ends: 3255 [2021-04-15 04:26:41,905 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:26:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-04-15 04:26:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2791. [2021-04-15 04:26:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.8562724014336918) internal successors, (10759), 2790 states have internal predecessors, (10759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10759 transitions. [2021-04-15 04:26:42,087 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10759 transitions. Word has length 26 [2021-04-15 04:26:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:42,087 INFO L480 AbstractCegarLoop]: Abstraction has 2791 states and 10759 transitions. [2021-04-15 04:26:42,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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) [2021-04-15 04:26:42,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10759 transitions. [2021-04-15 04:26:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:26:42,101 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:42,102 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:42,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 04:26:42,102 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:42,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:42,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1414582092, now seen corresponding path program 3 times [2021-04-15 04:26:42,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:42,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355169197] [2021-04-15 04:26:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:42,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355169197] [2021-04-15 04:26:42,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935757799] [2021-04-15 04:26:42,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:42,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:26:42,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:42,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 04:26:42,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:42,423 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:26:42,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-04-15 04:26:42,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:26:42,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:26:42,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:26:42,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:3 [2021-04-15 04:26:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:42,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:42,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 04:26:42,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440069900] [2021-04-15 04:26:42,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:26:42,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:26:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:26:42,468 INFO L87 Difference]: Start difference. First operand 2791 states and 10759 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:43,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:43,135 INFO L93 Difference]: Finished difference Result 7730 states and 29466 transitions. [2021-04-15 04:26:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 04:26:43,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 04:26:43,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:43,210 INFO L225 Difference]: With dead ends: 7730 [2021-04-15 04:26:43,211 INFO L226 Difference]: Without dead ends: 7083 [2021-04-15 04:26:43,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-04-15 04:26:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2021-04-15 04:26:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 2938. [2021-04-15 04:26:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 3.892066734763364) internal successors, (11431), 2937 states have internal predecessors, (11431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 11431 transitions. [2021-04-15 04:26:43,385 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 11431 transitions. Word has length 29 [2021-04-15 04:26:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:43,386 INFO L480 AbstractCegarLoop]: Abstraction has 2938 states and 11431 transitions. [2021-04-15 04:26:43,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 11431 transitions. [2021-04-15 04:26:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:26:43,399 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:43,400 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:43,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:43,622 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:43,623 INFO L82 PathProgramCache]: Analyzing trace with hash -690178897, now seen corresponding path program 1 times [2021-04-15 04:26:43,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:43,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000249094] [2021-04-15 04:26:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 04:26:43,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000249094] [2021-04-15 04:26:43,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:26:43,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:26:43,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261856888] [2021-04-15 04:26:43,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 04:26:43,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:43,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 04:26:43,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:26:43,651 INFO L87 Difference]: Start difference. First operand 2938 states and 11431 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:43,679 INFO L93 Difference]: Finished difference Result 2938 states and 11171 transitions. [2021-04-15 04:26:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:26:43,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 04:26:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:43,691 INFO L225 Difference]: With dead ends: 2938 [2021-04-15 04:26:43,691 INFO L226 Difference]: Without dead ends: 2938 [2021-04-15 04:26:43,692 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:26:43,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-04-15 04:26:43,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-04-15 04:26:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 3.8035410282601294) internal successors, (11171), 2937 states have internal predecessors, (11171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 11171 transitions. [2021-04-15 04:26:43,815 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 11171 transitions. Word has length 29 [2021-04-15 04:26:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:43,815 INFO L480 AbstractCegarLoop]: Abstraction has 2938 states and 11171 transitions. [2021-04-15 04:26:43,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 11171 transitions. [2021-04-15 04:26:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:26:43,828 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:43,828 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:43,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 04:26:43,829 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:43,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:43,829 INFO L82 PathProgramCache]: Analyzing trace with hash 866424555, now seen corresponding path program 2 times [2021-04-15 04:26:43,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:43,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825624457] [2021-04-15 04:26:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:26:43,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825624457] [2021-04-15 04:26:43,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387044529] [2021-04-15 04:26:43,885 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 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 [2021-04-15 04:26:43,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:26:43,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:43,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:26:43,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:26:44,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:44,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-04-15 04:26:44,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405446742] [2021-04-15 04:26:44,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 04:26:44,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:44,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 04:26:44,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:26:44,114 INFO L87 Difference]: Start difference. First operand 2938 states and 11171 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-04-15 04:26:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:44,474 INFO L93 Difference]: Finished difference Result 9089 states and 33364 transitions. [2021-04-15 04:26:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 04:26:44,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 29 [2021-04-15 04:26:44,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:44,541 INFO L225 Difference]: With dead ends: 9089 [2021-04-15 04:26:44,542 INFO L226 Difference]: Without dead ends: 9039 [2021-04-15 04:26:44,542 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:26:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-04-15 04:26:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 3700. [2021-04-15 04:26:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 3.9689105163557716) internal successors, (14681), 3699 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 14681 transitions. [2021-04-15 04:26:44,833 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 14681 transitions. Word has length 29 [2021-04-15 04:26:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:44,834 INFO L480 AbstractCegarLoop]: Abstraction has 3700 states and 14681 transitions. [2021-04-15 04:26:44,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-04-15 04:26:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 14681 transitions. [2021-04-15 04:26:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:26:44,855 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:44,855 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:45,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:45,077 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:45,077 INFO L82 PathProgramCache]: Analyzing trace with hash -595430549, now seen corresponding path program 3 times [2021-04-15 04:26:45,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:45,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952587236] [2021-04-15 04:26:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:26:45,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952587236] [2021-04-15 04:26:45,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959655597] [2021-04-15 04:26:45,122 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 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 [2021-04-15 04:26:45,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 04:26:45,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:45,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:26:45,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:26:45,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:45,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-04-15 04:26:45,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163859190] [2021-04-15 04:26:45,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 04:26:45,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:45,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 04:26:45,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:26:45,286 INFO L87 Difference]: Start difference. First operand 3700 states and 14681 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-04-15 04:26:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:45,624 INFO L93 Difference]: Finished difference Result 8113 states and 29971 transitions. [2021-04-15 04:26:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 04:26:45,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 29 [2021-04-15 04:26:45,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:45,677 INFO L225 Difference]: With dead ends: 8113 [2021-04-15 04:26:45,678 INFO L226 Difference]: Without dead ends: 8113 [2021-04-15 04:26:45,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:26:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8113 states. [2021-04-15 04:26:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8113 to 3985. [2021-04-15 04:26:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3985 states, 3984 states have (on average 3.9485441767068274) internal successors, (15731), 3984 states have internal predecessors, (15731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 15731 transitions. [2021-04-15 04:26:45,927 INFO L78 Accepts]: Start accepts. Automaton has 3985 states and 15731 transitions. Word has length 29 [2021-04-15 04:26:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:45,928 INFO L480 AbstractCegarLoop]: Abstraction has 3985 states and 15731 transitions. [2021-04-15 04:26:45,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-04-15 04:26:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3985 states and 15731 transitions. [2021-04-15 04:26:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 04:26:45,944 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:45,944 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:46,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:46,173 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:46,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:46,174 INFO L82 PathProgramCache]: Analyzing trace with hash 805726646, now seen corresponding path program 4 times [2021-04-15 04:26:46,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:46,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890614082] [2021-04-15 04:26:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:46,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890614082] [2021-04-15 04:26:46,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088491488] [2021-04-15 04:26:46,252 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 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 [2021-04-15 04:26:46,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:26:46,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:26:46,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:46,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:46,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-04-15 04:26:46,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998118936] [2021-04-15 04:26:46,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:26:46,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:46,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:26:46,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:26:46,405 INFO L87 Difference]: Start difference. First operand 3985 states and 15731 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-04-15 04:26:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:46,559 INFO L93 Difference]: Finished difference Result 7893 states and 31090 transitions. [2021-04-15 04:26:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 04:26:46,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 31 [2021-04-15 04:26:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:46,604 INFO L225 Difference]: With dead ends: 7893 [2021-04-15 04:26:46,605 INFO L226 Difference]: Without dead ends: 7621 [2021-04-15 04:26:46,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:26:46,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7621 states. [2021-04-15 04:26:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7621 to 6363. [2021-04-15 04:26:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6363 states, 6362 states have (on average 4.042125117887457) internal successors, (25716), 6362 states have internal predecessors, (25716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6363 states to 6363 states and 25716 transitions. [2021-04-15 04:26:46,887 INFO L78 Accepts]: Start accepts. Automaton has 6363 states and 25716 transitions. Word has length 31 [2021-04-15 04:26:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:46,888 INFO L480 AbstractCegarLoop]: Abstraction has 6363 states and 25716 transitions. [2021-04-15 04:26:46,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-04-15 04:26:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6363 states and 25716 transitions. [2021-04-15 04:26:46,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:26:46,914 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:46,915 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:47,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 04:26:47,129 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:47,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1071796465, now seen corresponding path program 4 times [2021-04-15 04:26:47,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:47,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962470903] [2021-04-15 04:26:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:26:47,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962470903] [2021-04-15 04:26:47,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426923953] [2021-04-15 04:26:47,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:47,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:26:47,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 04:26:47,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:26:47,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:47,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 04:26:47,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494367710] [2021-04-15 04:26:47,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 04:26:47,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:47,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 04:26:47,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:26:47,353 INFO L87 Difference]: Start difference. First operand 6363 states and 25716 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 04:26:47,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:47,448 INFO L93 Difference]: Finished difference Result 7990 states and 31805 transitions. [2021-04-15 04:26:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 04:26:47,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 32 [2021-04-15 04:26:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:47,487 INFO L225 Difference]: With dead ends: 7990 [2021-04-15 04:26:47,487 INFO L226 Difference]: Without dead ends: 7990 [2021-04-15 04:26:47,488 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:26:47,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-04-15 04:26:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 6023. [2021-04-15 04:26:47,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6023 states, 6022 states have (on average 3.988542012620392) internal successors, (24019), 6022 states have internal predecessors, (24019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 24019 transitions. [2021-04-15 04:26:47,840 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 24019 transitions. Word has length 32 [2021-04-15 04:26:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:47,840 INFO L480 AbstractCegarLoop]: Abstraction has 6023 states and 24019 transitions. [2021-04-15 04:26:47,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 04:26:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 24019 transitions. [2021-04-15 04:26:47,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:26:47,868 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:47,868 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:48,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-04-15 04:26:48,069 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:48,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2103834406, now seen corresponding path program 5 times [2021-04-15 04:26:48,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:48,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999549792] [2021-04-15 04:26:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:48,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999549792] [2021-04-15 04:26:48,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622443854] [2021-04-15 04:26:48,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:48,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:26:48,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:48,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:26:48,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:48,651 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-04-15 04:26:48,651 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 36 treesize of output 16 [2021-04-15 04:26:48,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:26:48,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:26:48,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:26:48,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:3 [2021-04-15 04:26:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:48,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:48,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 04:26:48,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915961447] [2021-04-15 04:26:48,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:26:48,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:48,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:26:48,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:26:48,693 INFO L87 Difference]: Start difference. First operand 6023 states and 24019 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:49,315 INFO L93 Difference]: Finished difference Result 14134 states and 55947 transitions. [2021-04-15 04:26:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:26:49,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:26:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:49,369 INFO L225 Difference]: With dead ends: 14134 [2021-04-15 04:26:49,370 INFO L226 Difference]: Without dead ends: 13721 [2021-04-15 04:26:49,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:26:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13721 states. [2021-04-15 04:26:49,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13721 to 6348. [2021-04-15 04:26:49,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6348 states, 6347 states have (on average 4.00330864975579) internal successors, (25409), 6347 states have internal predecessors, (25409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 25409 transitions. [2021-04-15 04:26:49,846 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 25409 transitions. Word has length 34 [2021-04-15 04:26:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:49,847 INFO L480 AbstractCegarLoop]: Abstraction has 6348 states and 25409 transitions. [2021-04-15 04:26:49,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 25409 transitions. [2021-04-15 04:26:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:26:49,871 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:49,871 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:50,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:50,085 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash 616045325, now seen corresponding path program 5 times [2021-04-15 04:26:50,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:50,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901093207] [2021-04-15 04:26:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:50,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901093207] [2021-04-15 04:26:50,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666477520] [2021-04-15 04:26:50,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:50,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:26:50,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:50,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 04:26:50,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:50,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:26:50,515 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 22 treesize of output 40 [2021-04-15 04:26:50,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 04:26:50,636 INFO L628 ElimStorePlain]: treesize reduction 16, result has 66.7 percent of original size [2021-04-15 04:26:50,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:26:50,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:28 [2021-04-15 04:26:50,784 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 27 treesize of output 21 [2021-04-15 04:26:50,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:26:50,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:26:50,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:26:50,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-04-15 04:26:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:50,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:50,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 04:26:50,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357710995] [2021-04-15 04:26:50,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:26:50,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:50,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:26:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:26:50,819 INFO L87 Difference]: Start difference. First operand 6348 states and 25409 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:52,046 INFO L93 Difference]: Finished difference Result 17828 states and 69084 transitions. [2021-04-15 04:26:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 04:26:52,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:26:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:52,122 INFO L225 Difference]: With dead ends: 17828 [2021-04-15 04:26:52,122 INFO L226 Difference]: Without dead ends: 17753 [2021-04-15 04:26:52,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 705.1ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:26:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17753 states. [2021-04-15 04:26:52,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17753 to 7658. [2021-04-15 04:26:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7658 states, 7657 states have (on average 4.0185451221104875) internal successors, (30770), 7657 states have internal predecessors, (30770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7658 states to 7658 states and 30770 transitions. [2021-04-15 04:26:52,631 INFO L78 Accepts]: Start accepts. Automaton has 7658 states and 30770 transitions. Word has length 34 [2021-04-15 04:26:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:52,641 INFO L480 AbstractCegarLoop]: Abstraction has 7658 states and 30770 transitions. [2021-04-15 04:26:52,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 7658 states and 30770 transitions. [2021-04-15 04:26:52,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:26:52,688 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:52,688 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:52,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:52,901 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:52,902 INFO L82 PathProgramCache]: Analyzing trace with hash -158773189, now seen corresponding path program 6 times [2021-04-15 04:26:52,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:52,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612386280] [2021-04-15 04:26:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:53,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612386280] [2021-04-15 04:26:53,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981510909] [2021-04-15 04:26:53,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:53,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:26:53,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:53,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:26:53,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:26:53,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:26:53,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:26:53,347 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 50 treesize of output 38 [2021-04-15 04:26:53,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:26:53,385 INFO L628 ElimStorePlain]: treesize reduction 7, result has 77.4 percent of original size [2021-04-15 04:26:53,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:26:53,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:24 [2021-04-15 04:26:53,479 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 [2021-04-15 04:26:53,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:26:53,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:26:53,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:26:53,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-04-15 04:26:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:53,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:53,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 04:26:53,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460827143] [2021-04-15 04:26:53,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:26:53,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:53,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:26:53,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:26:53,510 INFO L87 Difference]: Start difference. First operand 7658 states and 30770 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:54,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:54,692 INFO L93 Difference]: Finished difference Result 26431 states and 104477 transitions. [2021-04-15 04:26:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 04:26:54,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:26:54,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:54,811 INFO L225 Difference]: With dead ends: 26431 [2021-04-15 04:26:54,811 INFO L226 Difference]: Without dead ends: 26356 [2021-04-15 04:26:54,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 620.6ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:26:54,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26356 states. [2021-04-15 04:26:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26356 to 8714. [2021-04-15 04:26:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8714 states, 8713 states have (on average 4.058188913118329) internal successors, (35359), 8713 states have internal predecessors, (35359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8714 states to 8714 states and 35359 transitions. [2021-04-15 04:26:55,496 INFO L78 Accepts]: Start accepts. Automaton has 8714 states and 35359 transitions. Word has length 34 [2021-04-15 04:26:55,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:55,496 INFO L480 AbstractCegarLoop]: Abstraction has 8714 states and 35359 transitions. [2021-04-15 04:26:55,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:55,496 INFO L276 IsEmpty]: Start isEmpty. Operand 8714 states and 35359 transitions. [2021-04-15 04:26:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:26:55,531 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:55,531 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:55,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 04:26:55,745 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:55,745 INFO L82 PathProgramCache]: Analyzing trace with hash -824736107, now seen corresponding path program 7 times [2021-04-15 04:26:55,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:55,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100418216] [2021-04-15 04:26:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:55,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100418216] [2021-04-15 04:26:55,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415565613] [2021-04-15 04:26:55,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:26:55,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:56,100 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 32 treesize of output 26 [2021-04-15 04:26:56,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:26:56,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:26:56,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:26:56,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-04-15 04:26:56,144 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:26:56,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:26:56,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:26:56,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:26:56,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:26:56,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-04-15 04:26:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:56,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:56,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:26:56,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518021200] [2021-04-15 04:26:56,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:26:56,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:56,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:26:56,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:26:56,178 INFO L87 Difference]: Start difference. First operand 8714 states and 35359 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:56,936 INFO L93 Difference]: Finished difference Result 19981 states and 79468 transitions. [2021-04-15 04:26:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 04:26:56,936 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:26:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:57,017 INFO L225 Difference]: With dead ends: 19981 [2021-04-15 04:26:57,017 INFO L226 Difference]: Without dead ends: 19826 [2021-04-15 04:26:57,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:26:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19826 states. [2021-04-15 04:26:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19826 to 8750. [2021-04-15 04:26:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 8749 states have (on average 4.062750028574694) internal successors, (35545), 8749 states have internal predecessors, (35545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 35545 transitions. [2021-04-15 04:26:57,463 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 35545 transitions. Word has length 34 [2021-04-15 04:26:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:57,463 INFO L480 AbstractCegarLoop]: Abstraction has 8750 states and 35545 transitions. [2021-04-15 04:26:57,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 35545 transitions. [2021-04-15 04:26:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:26:57,487 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:57,487 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:57,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 04:26:57,688 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1500154431, now seen corresponding path program 8 times [2021-04-15 04:26:57,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:57,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162689646] [2021-04-15 04:26:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:57,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162689646] [2021-04-15 04:26:57,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203355445] [2021-04-15 04:26:57,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:57,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:26:57,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:57,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:26:57,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:58,023 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:26:58,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-04-15 04:26:58,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:26:58,040 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-04-15 04:26:58,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:26:58,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-04-15 04:26:58,078 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 [2021-04-15 04:26:58,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:26:58,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:26:58,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:26:58,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-04-15 04:26:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:58,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:58,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:26:58,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345759438] [2021-04-15 04:26:58,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:26:58,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:58,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:26:58,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:26:58,108 INFO L87 Difference]: Start difference. First operand 8750 states and 35545 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:59,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:59,013 INFO L93 Difference]: Finished difference Result 24924 states and 99773 transitions. [2021-04-15 04:26:59,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:26:59,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:26:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:59,083 INFO L225 Difference]: With dead ends: 24924 [2021-04-15 04:26:59,083 INFO L226 Difference]: Without dead ends: 24849 [2021-04-15 04:26:59,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:26:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24849 states. [2021-04-15 04:26:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24849 to 10107. [2021-04-15 04:26:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10107 states, 10106 states have (on average 4.0783692855729266) internal successors, (41216), 10106 states have internal predecessors, (41216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 41216 transitions. [2021-04-15 04:26:59,441 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 41216 transitions. Word has length 34 [2021-04-15 04:26:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:59,442 INFO L480 AbstractCegarLoop]: Abstraction has 10107 states and 41216 transitions. [2021-04-15 04:26:59,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 41216 transitions. [2021-04-15 04:26:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:26:59,469 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:59,469 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:59,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 04:26:59,670 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:59,670 INFO L82 PathProgramCache]: Analyzing trace with hash 834191513, now seen corresponding path program 9 times [2021-04-15 04:26:59,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:59,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183337480] [2021-04-15 04:26:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:59,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183337480] [2021-04-15 04:26:59,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713172518] [2021-04-15 04:26:59,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:59,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:26:59,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:26:59,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:59,989 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 32 treesize of output 26 [2021-04-15 04:26:59,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:26:59,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:00,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:00,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-04-15 04:27:00,033 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:27:00,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:27:00,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:00,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:00,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:00,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-04-15 04:27:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:00,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:00,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:00,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955422420] [2021-04-15 04:27:00,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:00,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:00,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:00,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:00,063 INFO L87 Difference]: Start difference. First operand 10107 states and 41216 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:00,359 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-04-15 04:27:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:00,863 INFO L93 Difference]: Finished difference Result 23710 states and 94971 transitions. [2021-04-15 04:27:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:27:00,864 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:00,964 INFO L225 Difference]: With dead ends: 23710 [2021-04-15 04:27:00,964 INFO L226 Difference]: Without dead ends: 23595 [2021-04-15 04:27:00,964 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:27:01,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23595 states. [2021-04-15 04:27:01,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23595 to 9723. [2021-04-15 04:27:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9723 states, 9722 states have (on average 4.074675992594116) internal successors, (39614), 9722 states have internal predecessors, (39614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9723 states to 9723 states and 39614 transitions. [2021-04-15 04:27:01,523 INFO L78 Accepts]: Start accepts. Automaton has 9723 states and 39614 transitions. Word has length 34 [2021-04-15 04:27:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:01,525 INFO L480 AbstractCegarLoop]: Abstraction has 9723 states and 39614 transitions. [2021-04-15 04:27:01,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:01,525 INFO L276 IsEmpty]: Start isEmpty. Operand 9723 states and 39614 transitions. [2021-04-15 04:27:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:01,552 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:01,552 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:01,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:01,753 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:01,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1500178855, now seen corresponding path program 10 times [2021-04-15 04:27:01,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:01,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003161793] [2021-04-15 04:27:01,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:01,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003161793] [2021-04-15 04:27:01,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953567974] [2021-04-15 04:27:01,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:01,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:27:01,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:01,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:01,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:02,067 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 26 treesize of output 20 [2021-04-15 04:27:02,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:02,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:02,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:02,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-04-15 04:27:02,161 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:02,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:27:02,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:02,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:02,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:02,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-04-15 04:27:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:02,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:02,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:02,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038991725] [2021-04-15 04:27:02,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:02,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:02,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:02,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:02,193 INFO L87 Difference]: Start difference. First operand 9723 states and 39614 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:02,989 INFO L93 Difference]: Finished difference Result 22988 states and 91824 transitions. [2021-04-15 04:27:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 04:27:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:03,090 INFO L225 Difference]: With dead ends: 22988 [2021-04-15 04:27:03,091 INFO L226 Difference]: Without dead ends: 22753 [2021-04-15 04:27:03,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 340.7ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-04-15 04:27:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22753 states. [2021-04-15 04:27:03,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22753 to 9831. [2021-04-15 04:27:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9831 states, 9830 states have (on average 4.077110885045778) internal successors, (40078), 9830 states have internal predecessors, (40078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9831 states to 9831 states and 40078 transitions. [2021-04-15 04:27:03,460 INFO L78 Accepts]: Start accepts. Automaton has 9831 states and 40078 transitions. Word has length 34 [2021-04-15 04:27:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:03,461 INFO L480 AbstractCegarLoop]: Abstraction has 9831 states and 40078 transitions. [2021-04-15 04:27:03,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 9831 states and 40078 transitions. [2021-04-15 04:27:03,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:03,490 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:03,490 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:03,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:03,701 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:03,702 INFO L82 PathProgramCache]: Analyzing trace with hash -573433369, now seen corresponding path program 11 times [2021-04-15 04:27:03,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:03,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970204903] [2021-04-15 04:27:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:03,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970204903] [2021-04-15 04:27:03,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895909252] [2021-04-15 04:27:03,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:04,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:27:04,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:04,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:27:04,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:04,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:27:04,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:27:04,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:27:04,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:04,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 58 [2021-04-15 04:27:04,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 04:27:04,468 INFO L628 ElimStorePlain]: treesize reduction 22, result has 56.9 percent of original size [2021-04-15 04:27:04,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:27:04,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:28 [2021-04-15 04:27:04,546 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 [2021-04-15 04:27:04,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:04,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:04,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:04,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-04-15 04:27:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:04,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:04,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 04:27:04,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138781413] [2021-04-15 04:27:04,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:04,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:04,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:04,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:04,575 INFO L87 Difference]: Start difference. First operand 9831 states and 40078 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:06,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:06,188 INFO L93 Difference]: Finished difference Result 26430 states and 105005 transitions. [2021-04-15 04:27:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 04:27:06,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:06,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:06,307 INFO L225 Difference]: With dead ends: 26430 [2021-04-15 04:27:06,308 INFO L226 Difference]: Without dead ends: 26355 [2021-04-15 04:27:06,308 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1158.5ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:27:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26355 states. [2021-04-15 04:27:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26355 to 10895. [2021-04-15 04:27:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10895 states, 10894 states have (on average 4.096016155682027) internal successors, (44622), 10894 states have internal predecessors, (44622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10895 states to 10895 states and 44622 transitions. [2021-04-15 04:27:06,798 INFO L78 Accepts]: Start accepts. Automaton has 10895 states and 44622 transitions. Word has length 34 [2021-04-15 04:27:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:06,798 INFO L480 AbstractCegarLoop]: Abstraction has 10895 states and 44622 transitions. [2021-04-15 04:27:06,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:06,798 INFO L276 IsEmpty]: Start isEmpty. Operand 10895 states and 44622 transitions. [2021-04-15 04:27:06,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:06,834 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:06,835 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:07,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:07,040 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:07,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:07,041 INFO L82 PathProgramCache]: Analyzing trace with hash -316777907, now seen corresponding path program 12 times [2021-04-15 04:27:07,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:07,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266655467] [2021-04-15 04:27:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:07,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266655467] [2021-04-15 04:27:07,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835511756] [2021-04-15 04:27:07,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:07,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:27:07,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:07,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 04:27:07,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:07,687 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 28 treesize of output 22 [2021-04-15 04:27:07,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:07,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:07,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:27:07,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:36 [2021-04-15 04:27:07,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:27:07,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:07,790 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 [2021-04-15 04:27:07,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:27:07,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:07,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:27:07,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:13 [2021-04-15 04:27:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:07,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:07,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 04:27:07,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235458474] [2021-04-15 04:27:07,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:07,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:07,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:07,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:07,898 INFO L87 Difference]: Start difference. First operand 10895 states and 44622 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:08,753 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-04-15 04:27:09,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:09,324 INFO L93 Difference]: Finished difference Result 28412 states and 113321 transitions. [2021-04-15 04:27:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 04:27:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:09,470 INFO L225 Difference]: With dead ends: 28412 [2021-04-15 04:27:09,471 INFO L226 Difference]: Without dead ends: 28297 [2021-04-15 04:27:09,471 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 848.8ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:27:09,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28297 states. [2021-04-15 04:27:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28297 to 10659. [2021-04-15 04:27:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10659 states, 10658 states have (on average 4.094952148620754) internal successors, (43644), 10658 states have internal predecessors, (43644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 43644 transitions. [2021-04-15 04:27:10,025 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 43644 transitions. Word has length 34 [2021-04-15 04:27:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:10,025 INFO L480 AbstractCegarLoop]: Abstraction has 10659 states and 43644 transitions. [2021-04-15 04:27:10,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 43644 transitions. [2021-04-15 04:27:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:10,061 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:10,062 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:10,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 04:27:10,268 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:10,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1202868029, now seen corresponding path program 13 times [2021-04-15 04:27:10,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:10,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898453917] [2021-04-15 04:27:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:10,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898453917] [2021-04-15 04:27:10,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342195449] [2021-04-15 04:27:10,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:10,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:10,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:10,608 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 19 treesize of output 15 [2021-04-15 04:27:10,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:10,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:10,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:10,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-04-15 04:27:10,684 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:10,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:27:10,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:10,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:10,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:10,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-04-15 04:27:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:10,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:10,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:10,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926488882] [2021-04-15 04:27:10,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:10,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:10,720 INFO L87 Difference]: Start difference. First operand 10659 states and 43644 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:11,206 INFO L93 Difference]: Finished difference Result 19194 states and 76806 transitions. [2021-04-15 04:27:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:27:11,207 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 34 [2021-04-15 04:27:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:11,291 INFO L225 Difference]: With dead ends: 19194 [2021-04-15 04:27:11,291 INFO L226 Difference]: Without dead ends: 19079 [2021-04-15 04:27:11,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:27:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19079 states. [2021-04-15 04:27:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19079 to 10744. [2021-04-15 04:27:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10744 states, 10743 states have (on average 4.095783300753979) internal successors, (44001), 10743 states have internal predecessors, (44001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10744 states to 10744 states and 44001 transitions. [2021-04-15 04:27:11,704 INFO L78 Accepts]: Start accepts. Automaton has 10744 states and 44001 transitions. Word has length 34 [2021-04-15 04:27:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:11,704 INFO L480 AbstractCegarLoop]: Abstraction has 10744 states and 44001 transitions. [2021-04-15 04:27:11,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 10744 states and 44001 transitions. [2021-04-15 04:27:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:11,733 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:11,734 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:11,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-04-15 04:27:11,937 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:11,938 INFO L82 PathProgramCache]: Analyzing trace with hash 431927787, now seen corresponding path program 14 times [2021-04-15 04:27:11,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:11,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279628968] [2021-04-15 04:27:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:12,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279628968] [2021-04-15 04:27:12,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719511268] [2021-04-15 04:27:12,073 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 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 [2021-04-15 04:27:12,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:27:12,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:12,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:12,307 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:12,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-04-15 04:27:12,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:12,320 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-04-15 04:27:12,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:12,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-04-15 04:27:12,378 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 [2021-04-15 04:27:12,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:12,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:12,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:12,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-04-15 04:27:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:12,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:12,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:12,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562444090] [2021-04-15 04:27:12,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:12,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:12,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:12,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:12,411 INFO L87 Difference]: Start difference. First operand 10744 states and 44001 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:13,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:13,700 INFO L93 Difference]: Finished difference Result 24998 states and 100164 transitions. [2021-04-15 04:27:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 04:27:13,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:13,820 INFO L225 Difference]: With dead ends: 24998 [2021-04-15 04:27:13,820 INFO L226 Difference]: Without dead ends: 24923 [2021-04-15 04:27:13,820 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 776.6ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:27:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24923 states. [2021-04-15 04:27:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24923 to 11500. [2021-04-15 04:27:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11500 states, 11499 states have (on average 4.106009218192886) internal successors, (47215), 11499 states have internal predecessors, (47215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11500 states to 11500 states and 47215 transitions. [2021-04-15 04:27:14,323 INFO L78 Accepts]: Start accepts. Automaton has 11500 states and 47215 transitions. Word has length 34 [2021-04-15 04:27:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:14,324 INFO L480 AbstractCegarLoop]: Abstraction has 11500 states and 47215 transitions. [2021-04-15 04:27:14,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 11500 states and 47215 transitions. [2021-04-15 04:27:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:14,358 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:14,358 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:14,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:14,559 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:14,559 INFO L82 PathProgramCache]: Analyzing trace with hash 688583249, now seen corresponding path program 15 times [2021-04-15 04:27:14,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:14,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506741209] [2021-04-15 04:27:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:14,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506741209] [2021-04-15 04:27:14,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329664531] [2021-04-15 04:27:14,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:14,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:27:14,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:14,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:27:14,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:14,883 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 34 treesize of output 28 [2021-04-15 04:27:14,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:14,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:14,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:14,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:31 [2021-04-15 04:27:14,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:27:14,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:14,969 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 37 treesize of output 37 [2021-04-15 04:27:14,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:27:15,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:15,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:27:15,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-04-15 04:27:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:15,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:15,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 04:27:15,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011437138] [2021-04-15 04:27:15,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:15,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:15,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:15,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:15,073 INFO L87 Difference]: Start difference. First operand 11500 states and 47215 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:16,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:16,596 INFO L93 Difference]: Finished difference Result 23541 states and 94127 transitions. [2021-04-15 04:27:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:27:16,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:16,690 INFO L225 Difference]: With dead ends: 23541 [2021-04-15 04:27:16,690 INFO L226 Difference]: Without dead ends: 23426 [2021-04-15 04:27:16,691 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 919.7ms TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:27:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23426 states. [2021-04-15 04:27:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23426 to 11260. [2021-04-15 04:27:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11260 states, 11259 states have (on average 4.104893862687628) internal successors, (46217), 11259 states have internal predecessors, (46217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11260 states to 11260 states and 46217 transitions. [2021-04-15 04:27:17,152 INFO L78 Accepts]: Start accepts. Automaton has 11260 states and 46217 transitions. Word has length 34 [2021-04-15 04:27:17,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:17,152 INFO L480 AbstractCegarLoop]: Abstraction has 11260 states and 46217 transitions. [2021-04-15 04:27:17,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 11260 states and 46217 transitions. [2021-04-15 04:27:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:17,185 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:17,185 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:17,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-04-15 04:27:17,388 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2086738111, now seen corresponding path program 16 times [2021-04-15 04:27:17,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:17,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645263084] [2021-04-15 04:27:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:17,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645263084] [2021-04-15 04:27:17,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406540940] [2021-04-15 04:27:17,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:17,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:27:17,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:17,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:17,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:17,694 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 19 treesize of output 15 [2021-04-15 04:27:17,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:17,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:17,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:17,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-04-15 04:27:17,763 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:17,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:27:17,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:17,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:17,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:17,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-04-15 04:27:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:17,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:17,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:17,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221306052] [2021-04-15 04:27:17,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:17,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:17,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:17,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:17,799 INFO L87 Difference]: Start difference. First operand 11260 states and 46217 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:18,629 INFO L93 Difference]: Finished difference Result 22298 states and 89003 transitions. [2021-04-15 04:27:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:27:18,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 34 [2021-04-15 04:27:18,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:18,725 INFO L225 Difference]: With dead ends: 22298 [2021-04-15 04:27:18,725 INFO L226 Difference]: Without dead ends: 22143 [2021-04-15 04:27:18,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:27:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22143 states. [2021-04-15 04:27:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22143 to 12043. [2021-04-15 04:27:19,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12043 states, 12042 states have (on average 4.112855007473842) internal successors, (49527), 12042 states have internal predecessors, (49527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12043 states to 12043 states and 49527 transitions. [2021-04-15 04:27:19,189 INFO L78 Accepts]: Start accepts. Automaton has 12043 states and 49527 transitions. Word has length 34 [2021-04-15 04:27:19,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:19,189 INFO L480 AbstractCegarLoop]: Abstraction has 12043 states and 49527 transitions. [2021-04-15 04:27:19,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:19,189 INFO L276 IsEmpty]: Start isEmpty. Operand 12043 states and 49527 transitions. [2021-04-15 04:27:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:19,223 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:19,223 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:19,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:19,425 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1516120409, now seen corresponding path program 17 times [2021-04-15 04:27:19,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:19,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109854518] [2021-04-15 04:27:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:19,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109854518] [2021-04-15 04:27:19,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772556763] [2021-04-15 04:27:19,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:19,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:27:19,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:19,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:27:19,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:19,777 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-04-15 04:27:19,777 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 37 treesize of output 37 [2021-04-15 04:27:19,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:27:19,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:19,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:27:19,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:30 [2021-04-15 04:27:19,912 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 27 treesize of output 21 [2021-04-15 04:27:19,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:19,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:19,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:19,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-04-15 04:27:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:19,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:19,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 04:27:19,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913371876] [2021-04-15 04:27:19,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:19,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:19,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:19,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:19,945 INFO L87 Difference]: Start difference. First operand 12043 states and 49527 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:21,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:21,349 INFO L93 Difference]: Finished difference Result 36456 states and 147208 transitions. [2021-04-15 04:27:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:27:21,350 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:21,513 INFO L225 Difference]: With dead ends: 36456 [2021-04-15 04:27:21,514 INFO L226 Difference]: Without dead ends: 36381 [2021-04-15 04:27:21,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 638.9ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:27:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36381 states. [2021-04-15 04:27:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36381 to 13600. [2021-04-15 04:27:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13600 states, 13599 states have (on average 4.1242003088462384) internal successors, (56085), 13599 states have internal predecessors, (56085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:22,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13600 states to 13600 states and 56085 transitions. [2021-04-15 04:27:22,194 INFO L78 Accepts]: Start accepts. Automaton has 13600 states and 56085 transitions. Word has length 34 [2021-04-15 04:27:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:22,194 INFO L480 AbstractCegarLoop]: Abstraction has 13600 states and 56085 transitions. [2021-04-15 04:27:22,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand 13600 states and 56085 transitions. [2021-04-15 04:27:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:22,234 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:22,234 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:22,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:22,435 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:22,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1259464947, now seen corresponding path program 18 times [2021-04-15 04:27:22,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:22,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137071229] [2021-04-15 04:27:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:22,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137071229] [2021-04-15 04:27:22,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259336107] [2021-04-15 04:27:22,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:22,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:27:22,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:22,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:27:22,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:22,789 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 34 treesize of output 28 [2021-04-15 04:27:22,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:22,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:22,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:22,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:31 [2021-04-15 04:27:22,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:27:22,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:22,859 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 37 treesize of output 37 [2021-04-15 04:27:22,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:27:22,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:22,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:27:22,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-04-15 04:27:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:22,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:22,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 04:27:22,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487228076] [2021-04-15 04:27:22,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:22,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:22,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:22,948 INFO L87 Difference]: Start difference. First operand 13600 states and 56085 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:24,255 INFO L93 Difference]: Finished difference Result 26172 states and 105952 transitions. [2021-04-15 04:27:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 04:27:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:24,378 INFO L225 Difference]: With dead ends: 26172 [2021-04-15 04:27:24,378 INFO L226 Difference]: Without dead ends: 26057 [2021-04-15 04:27:24,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 784.8ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:27:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2021-04-15 04:27:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 13750. [2021-04-15 04:27:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13750 states, 13749 states have (on average 4.126918321332461) internal successors, (56741), 13749 states have internal predecessors, (56741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13750 states to 13750 states and 56741 transitions. [2021-04-15 04:27:24,955 INFO L78 Accepts]: Start accepts. Automaton has 13750 states and 56741 transitions. Word has length 34 [2021-04-15 04:27:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:24,955 INFO L480 AbstractCegarLoop]: Abstraction has 13750 states and 56741 transitions. [2021-04-15 04:27:24,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 13750 states and 56741 transitions. [2021-04-15 04:27:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:24,996 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:24,996 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:25,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-04-15 04:27:25,200 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:25,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:25,201 INFO L82 PathProgramCache]: Analyzing trace with hash -756448751, now seen corresponding path program 19 times [2021-04-15 04:27:25,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:25,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821871924] [2021-04-15 04:27:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:25,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821871924] [2021-04-15 04:27:25,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171336991] [2021-04-15 04:27:25,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:25,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:25,512 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 26 treesize of output 20 [2021-04-15 04:27:25,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:25,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:25,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:25,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-04-15 04:27:25,596 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:25,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:27:25,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:25,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:25,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:25,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-04-15 04:27:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:25,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:25,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:25,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156541298] [2021-04-15 04:27:25,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:25,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:25,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:25,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:25,635 INFO L87 Difference]: Start difference. First operand 13750 states and 56741 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:26,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:26,440 INFO L93 Difference]: Finished difference Result 28454 states and 114913 transitions. [2021-04-15 04:27:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 04:27:26,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:26,562 INFO L225 Difference]: With dead ends: 28454 [2021-04-15 04:27:26,562 INFO L226 Difference]: Without dead ends: 28219 [2021-04-15 04:27:26,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 429.2ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-04-15 04:27:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28219 states. [2021-04-15 04:27:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28219 to 12943. [2021-04-15 04:27:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12943 states, 12942 states have (on average 4.129346314325452) internal successors, (53442), 12942 states have internal predecessors, (53442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12943 states to 12943 states and 53442 transitions. [2021-04-15 04:27:27,070 INFO L78 Accepts]: Start accepts. Automaton has 12943 states and 53442 transitions. Word has length 34 [2021-04-15 04:27:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:27,070 INFO L480 AbstractCegarLoop]: Abstraction has 12943 states and 53442 transitions. [2021-04-15 04:27:27,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 12943 states and 53442 transitions. [2021-04-15 04:27:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:27,111 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:27,111 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:27,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:27,312 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1335361853, now seen corresponding path program 20 times [2021-04-15 04:27:27,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:27,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515985701] [2021-04-15 04:27:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:27,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515985701] [2021-04-15 04:27:27,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932652701] [2021-04-15 04:27:27,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:27,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:27:27,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:27,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:27,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:27,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-04-15 04:27:27,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:27,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:27,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:27,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-04-15 04:27:27,681 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:27,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:27:27,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:27,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:27,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:27,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-04-15 04:27:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:27,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:27,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:27,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113769779] [2021-04-15 04:27:27,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:27,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:27,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:27,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:27,719 INFO L87 Difference]: Start difference. First operand 12943 states and 53442 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:28,620 INFO L93 Difference]: Finished difference Result 23438 states and 94591 transitions. [2021-04-15 04:27:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 04:27:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 34 [2021-04-15 04:27:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:28,732 INFO L225 Difference]: With dead ends: 23438 [2021-04-15 04:27:28,732 INFO L226 Difference]: Without dead ends: 23283 [2021-04-15 04:27:28,733 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 601.5ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:27:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23283 states. [2021-04-15 04:27:29,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23283 to 13180. [2021-04-15 04:27:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13180 states, 13179 states have (on average 4.129524243114045) internal successors, (54423), 13179 states have internal predecessors, (54423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13180 states to 13180 states and 54423 transitions. [2021-04-15 04:27:29,238 INFO L78 Accepts]: Start accepts. Automaton has 13180 states and 54423 transitions. Word has length 34 [2021-04-15 04:27:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:29,238 INFO L480 AbstractCegarLoop]: Abstraction has 13180 states and 54423 transitions. [2021-04-15 04:27:29,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 13180 states and 54423 transitions. [2021-04-15 04:27:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:29,279 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:29,279 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:29,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-04-15 04:27:29,481 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:29,481 INFO L82 PathProgramCache]: Analyzing trace with hash 53048833, now seen corresponding path program 21 times [2021-04-15 04:27:29,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:29,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25459223] [2021-04-15 04:27:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:29,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25459223] [2021-04-15 04:27:29,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325087837] [2021-04-15 04:27:29,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:29,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:27:29,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:29,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:27:29,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:29,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-04-15 04:27:29,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:29,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:29,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:29,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-04-15 04:27:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:27:30,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:30,016 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 37 treesize of output 37 [2021-04-15 04:27:30,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:27:30,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:30,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:27:30,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-04-15 04:27:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:30,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:30,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 04:27:30,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741574950] [2021-04-15 04:27:30,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:30,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:30,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:30,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:30,110 INFO L87 Difference]: Start difference. First operand 13180 states and 54423 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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) [2021-04-15 04:27:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:31,107 INFO L93 Difference]: Finished difference Result 27881 states and 112706 transitions. [2021-04-15 04:27:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 04:27:31,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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 34 [2021-04-15 04:27:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:31,203 INFO L225 Difference]: With dead ends: 27881 [2021-04-15 04:27:31,203 INFO L226 Difference]: Without dead ends: 27646 [2021-04-15 04:27:31,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 666.9ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:27:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27646 states. [2021-04-15 04:27:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27646 to 13288. [2021-04-15 04:27:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13288 states, 13287 states have (on average 4.130879807330474) internal successors, (54887), 13287 states have internal predecessors, (54887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13288 states to 13288 states and 54887 transitions. [2021-04-15 04:27:31,594 INFO L78 Accepts]: Start accepts. Automaton has 13288 states and 54887 transitions. Word has length 34 [2021-04-15 04:27:31,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:31,594 INFO L480 AbstractCegarLoop]: Abstraction has 13288 states and 54887 transitions. [2021-04-15 04:27:31,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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) [2021-04-15 04:27:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 13288 states and 54887 transitions. [2021-04-15 04:27:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:31,623 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:31,623 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:31,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-04-15 04:27:31,824 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:31,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1169034441, now seen corresponding path program 22 times [2021-04-15 04:27:31,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:31,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840974855] [2021-04-15 04:27:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:32,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840974855] [2021-04-15 04:27:32,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099688699] [2021-04-15 04:27:32,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:32,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:27:32,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:32,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:32,206 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:32,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-04-15 04:27:32,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:32,217 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-04-15 04:27:32,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:32,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-04-15 04:27:32,258 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 [2021-04-15 04:27:32,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:32,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:32,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:32,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-04-15 04:27:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:32,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:32,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:32,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925962635] [2021-04-15 04:27:32,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:32,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:32,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:32,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:32,288 INFO L87 Difference]: Start difference. First operand 13288 states and 54887 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:32,847 INFO L93 Difference]: Finished difference Result 20392 states and 83172 transitions. [2021-04-15 04:27:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:27:32,847 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:32,911 INFO L225 Difference]: With dead ends: 20392 [2021-04-15 04:27:32,912 INFO L226 Difference]: Without dead ends: 20317 [2021-04-15 04:27:32,912 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 508.5ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:27:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20317 states. [2021-04-15 04:27:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20317 to 13899. [2021-04-15 04:27:33,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13899 states, 13898 states have (on average 4.1316736221039) internal successors, (57422), 13898 states have internal predecessors, (57422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13899 states to 13899 states and 57422 transitions. [2021-04-15 04:27:33,282 INFO L78 Accepts]: Start accepts. Automaton has 13899 states and 57422 transitions. Word has length 34 [2021-04-15 04:27:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:33,282 INFO L480 AbstractCegarLoop]: Abstraction has 13899 states and 57422 transitions. [2021-04-15 04:27:33,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 13899 states and 57422 transitions. [2021-04-15 04:27:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:33,322 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:33,322 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:33,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-04-15 04:27:33,546 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:33,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:33,546 INFO L82 PathProgramCache]: Analyzing trace with hash -912378979, now seen corresponding path program 23 times [2021-04-15 04:27:33,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:33,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435509461] [2021-04-15 04:27:33,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:33,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435509461] [2021-04-15 04:27:33,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763085051] [2021-04-15 04:27:33,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:27:33,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:27:33,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:33,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 04:27:33,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:34,198 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-04-15 04:27:34,207 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 28 treesize of output 22 [2021-04-15 04:27:34,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:34,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:34,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:27:34,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:38 [2021-04-15 04:27:34,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:27:34,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:34,287 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 [2021-04-15 04:27:34,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:27:34,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:34,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:27:34,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:11 [2021-04-15 04:27:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:34,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:34,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 04:27:34,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929926817] [2021-04-15 04:27:34,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:34,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:34,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:34,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:34,379 INFO L87 Difference]: Start difference. First operand 13899 states and 57422 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:35,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:35,170 INFO L93 Difference]: Finished difference Result 29230 states and 119098 transitions. [2021-04-15 04:27:35,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:27:35,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:35,267 INFO L225 Difference]: With dead ends: 29230 [2021-04-15 04:27:35,268 INFO L226 Difference]: Without dead ends: 29115 [2021-04-15 04:27:35,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:27:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29115 states. [2021-04-15 04:27:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29115 to 13767. [2021-04-15 04:27:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13767 states, 13766 states have (on average 4.136713642307133) internal successors, (56946), 13766 states have internal predecessors, (56946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13767 states to 13767 states and 56946 transitions. [2021-04-15 04:27:35,703 INFO L78 Accepts]: Start accepts. Automaton has 13767 states and 56946 transitions. Word has length 34 [2021-04-15 04:27:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:35,704 INFO L480 AbstractCegarLoop]: Abstraction has 13767 states and 56946 transitions. [2021-04-15 04:27:35,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 13767 states and 56946 transitions. [2021-04-15 04:27:35,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:35,735 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:35,735 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:35,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:35,937 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash 607266957, now seen corresponding path program 24 times [2021-04-15 04:27:35,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:35,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919006312] [2021-04-15 04:27:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:36,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919006312] [2021-04-15 04:27:36,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666102924] [2021-04-15 04:27:36,035 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 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 [2021-04-15 04:27:36,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:27:36,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:27:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:36,153 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 19 treesize of output 15 [2021-04-15 04:27:36,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:36,271 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-04-15 04:27:36,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:36,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:36,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-04-15 04:27:36,327 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:36,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:27:36,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:36,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:36,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:36,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-04-15 04:27:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:36,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:36,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:36,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078011430] [2021-04-15 04:27:36,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:36,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:36,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:36,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:36,365 INFO L87 Difference]: Start difference. First operand 13767 states and 56946 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:36,865 INFO L93 Difference]: Finished difference Result 24762 states and 100856 transitions. [2021-04-15 04:27:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:27:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 34 [2021-04-15 04:27:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:36,951 INFO L225 Difference]: With dead ends: 24762 [2021-04-15 04:27:36,952 INFO L226 Difference]: Without dead ends: 24647 [2021-04-15 04:27:36,952 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-04-15 04:27:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24647 states. [2021-04-15 04:27:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24647 to 13308. [2021-04-15 04:27:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13308 states, 13307 states have (on average 4.129631021267002) internal successors, (54953), 13307 states have internal predecessors, (54953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13308 states to 13308 states and 54953 transitions. [2021-04-15 04:27:37,335 INFO L78 Accepts]: Start accepts. Automaton has 13308 states and 54953 transitions. Word has length 34 [2021-04-15 04:27:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:37,335 INFO L480 AbstractCegarLoop]: Abstraction has 13308 states and 54953 transitions. [2021-04-15 04:27:37,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 13308 states and 54953 transitions. [2021-04-15 04:27:37,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:37,364 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:37,365 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:37,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-04-15 04:27:37,565 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:37,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:37,566 INFO L82 PathProgramCache]: Analyzing trace with hash -546754701, now seen corresponding path program 25 times [2021-04-15 04:27:37,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:37,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284838206] [2021-04-15 04:27:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:37,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284838206] [2021-04-15 04:27:37,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10492868] [2021-04-15 04:27:37,649 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 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 [2021-04-15 04:27:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:37,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:37,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:37,830 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:37,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-04-15 04:27:37,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:37,838 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-04-15 04:27:37,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:37,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-04-15 04:27:37,872 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 [2021-04-15 04:27:37,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:37,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:37,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:37,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-04-15 04:27:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:37,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:37,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:37,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908423151] [2021-04-15 04:27:37,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:37,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:37,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:37,902 INFO L87 Difference]: Start difference. First operand 13308 states and 54953 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:38,976 INFO L93 Difference]: Finished difference Result 30843 states and 125658 transitions. [2021-04-15 04:27:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 04:27:38,977 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:39,083 INFO L225 Difference]: With dead ends: 30843 [2021-04-15 04:27:39,084 INFO L226 Difference]: Without dead ends: 30768 [2021-04-15 04:27:39,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 566.2ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:27:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30768 states. [2021-04-15 04:27:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30768 to 14991. [2021-04-15 04:27:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14991 states, 14990 states have (on average 4.145030020013342) internal successors, (62134), 14990 states have internal predecessors, (62134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 62134 transitions. [2021-04-15 04:27:39,502 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 62134 transitions. Word has length 34 [2021-04-15 04:27:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:39,502 INFO L480 AbstractCegarLoop]: Abstraction has 14991 states and 62134 transitions. [2021-04-15 04:27:39,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 62134 transitions. [2021-04-15 04:27:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:39,531 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:39,531 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:39,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:39,733 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:39,733 INFO L82 PathProgramCache]: Analyzing trace with hash -290099239, now seen corresponding path program 26 times [2021-04-15 04:27:39,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:39,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999666767] [2021-04-15 04:27:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:39,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999666767] [2021-04-15 04:27:39,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985281116] [2021-04-15 04:27:39,803 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 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 [2021-04-15 04:27:39,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:27:39,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:39,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:39,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:39,956 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 32 treesize of output 26 [2021-04-15 04:27:39,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:39,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:39,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:39,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-04-15 04:27:40,000 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:40,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:27:40,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:40,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:40,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:40,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-04-15 04:27:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:40,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:40,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:40,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718251774] [2021-04-15 04:27:40,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:40,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:40,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:40,034 INFO L87 Difference]: Start difference. First operand 14991 states and 62134 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:40,685 INFO L93 Difference]: Finished difference Result 28364 states and 115770 transitions. [2021-04-15 04:27:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:27:40,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:40,782 INFO L225 Difference]: With dead ends: 28364 [2021-04-15 04:27:40,782 INFO L226 Difference]: Without dead ends: 28249 [2021-04-15 04:27:40,782 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 288.4ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-04-15 04:27:40,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28249 states. [2021-04-15 04:27:41,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28249 to 14487. [2021-04-15 04:27:41,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14487 states, 14486 states have (on average 4.141930139444981) internal successors, (60000), 14486 states have internal predecessors, (60000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14487 states to 14487 states and 60000 transitions. [2021-04-15 04:27:41,340 INFO L78 Accepts]: Start accepts. Automaton has 14487 states and 60000 transitions. Word has length 34 [2021-04-15 04:27:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:41,340 INFO L480 AbstractCegarLoop]: Abstraction has 14487 states and 60000 transitions. [2021-04-15 04:27:41,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 14487 states and 60000 transitions. [2021-04-15 04:27:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:41,374 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:41,374 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:41,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 04:27:41,575 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:41,575 INFO L82 PathProgramCache]: Analyzing trace with hash 212916957, now seen corresponding path program 27 times [2021-04-15 04:27:41,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:41,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770165663] [2021-04-15 04:27:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:41,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770165663] [2021-04-15 04:27:41,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710864701] [2021-04-15 04:27:41,665 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 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 [2021-04-15 04:27:41,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:27:41,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:41,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:27:41,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:41,804 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 26 treesize of output 20 [2021-04-15 04:27:41,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:41,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:41,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:41,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-04-15 04:27:41,874 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:27:41,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:27:41,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:41,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:41,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:41,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-04-15 04:27:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:41,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:41,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:41,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872482146] [2021-04-15 04:27:41,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:41,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:41,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:41,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:41,901 INFO L87 Difference]: Start difference. First operand 14487 states and 60000 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:42,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:42,626 INFO L93 Difference]: Finished difference Result 30736 states and 125294 transitions. [2021-04-15 04:27:42,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 04:27:42,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:27:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:42,744 INFO L225 Difference]: With dead ends: 30736 [2021-04-15 04:27:42,744 INFO L226 Difference]: Without dead ends: 30501 [2021-04-15 04:27:42,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:27:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30501 states. [2021-04-15 04:27:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30501 to 13662. [2021-04-15 04:27:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13662 states, 13661 states have (on average 4.144498938584291) internal successors, (56618), 13661 states have internal predecessors, (56618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 56618 transitions. [2021-04-15 04:27:43,209 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 56618 transitions. Word has length 34 [2021-04-15 04:27:43,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:43,209 INFO L480 AbstractCegarLoop]: Abstraction has 13662 states and 56618 transitions. [2021-04-15 04:27:43,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:43,209 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 56618 transitions. [2021-04-15 04:27:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:43,243 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:43,244 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:43,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-04-15 04:27:43,444 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:43,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1990239735, now seen corresponding path program 28 times [2021-04-15 04:27:43,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:43,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589271789] [2021-04-15 04:27:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:43,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589271789] [2021-04-15 04:27:43,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177408861] [2021-04-15 04:27:43,546 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 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 [2021-04-15 04:27:43,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:27:43,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:43,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:43,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:43,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-04-15 04:27:43,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:43,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:43,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:43,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-04-15 04:27:43,741 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:43,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:27:43,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:43,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:43,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:43,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-04-15 04:27:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:43,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:43,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:43,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707941180] [2021-04-15 04:27:43,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:43,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:43,775 INFO L87 Difference]: Start difference. First operand 13662 states and 56618 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:44,531 INFO L93 Difference]: Finished difference Result 24729 states and 99644 transitions. [2021-04-15 04:27:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 04:27:44,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 34 [2021-04-15 04:27:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:44,606 INFO L225 Difference]: With dead ends: 24729 [2021-04-15 04:27:44,606 INFO L226 Difference]: Without dead ends: 24574 [2021-04-15 04:27:44,607 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:27:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24574 states. [2021-04-15 04:27:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24574 to 13674. [2021-04-15 04:27:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13674 states, 13673 states have (on average 4.145103488627221) internal successors, (56676), 13673 states have internal predecessors, (56676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13674 states to 13674 states and 56676 transitions. [2021-04-15 04:27:45,081 INFO L78 Accepts]: Start accepts. Automaton has 13674 states and 56676 transitions. Word has length 34 [2021-04-15 04:27:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:45,081 INFO L480 AbstractCegarLoop]: Abstraction has 13674 states and 56676 transitions. [2021-04-15 04:27:45,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 13674 states and 56676 transitions. [2021-04-15 04:27:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:45,110 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:45,110 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:45,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-04-15 04:27:45,311 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:45,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:45,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1022414541, now seen corresponding path program 29 times [2021-04-15 04:27:45,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:45,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697134584] [2021-04-15 04:27:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:45,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697134584] [2021-04-15 04:27:45,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198328075] [2021-04-15 04:27:45,388 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 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 [2021-04-15 04:27:45,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:27:45,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:45,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 04:27:45,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:45,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-04-15 04:27:45,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:45,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:45,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:45,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-04-15 04:27:45,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:45,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-04-15 04:27:45,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:27:45,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:45,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:27:45,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:19 [2021-04-15 04:27:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:45,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:45,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 04:27:45,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537244754] [2021-04-15 04:27:45,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:45,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:45,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:45,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:45,643 INFO L87 Difference]: Start difference. First operand 13674 states and 56676 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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) [2021-04-15 04:27:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:46,868 INFO L93 Difference]: Finished difference Result 37613 states and 152667 transitions. [2021-04-15 04:27:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 04:27:46,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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 34 [2021-04-15 04:27:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:46,991 INFO L225 Difference]: With dead ends: 37613 [2021-04-15 04:27:46,991 INFO L226 Difference]: Without dead ends: 37323 [2021-04-15 04:27:46,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 807.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:27:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37323 states. [2021-04-15 04:27:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37323 to 14150. [2021-04-15 04:27:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14150 states, 14149 states have (on average 4.154003816524136) internal successors, (58775), 14149 states have internal predecessors, (58775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14150 states to 14150 states and 58775 transitions. [2021-04-15 04:27:47,462 INFO L78 Accepts]: Start accepts. Automaton has 14150 states and 58775 transitions. Word has length 34 [2021-04-15 04:27:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:47,462 INFO L480 AbstractCegarLoop]: Abstraction has 14150 states and 58775 transitions. [2021-04-15 04:27:47,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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) [2021-04-15 04:27:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 14150 states and 58775 transitions. [2021-04-15 04:27:47,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:47,494 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:47,494 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:47,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-04-15 04:27:47,695 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:47,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1427456559, now seen corresponding path program 30 times [2021-04-15 04:27:47,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:47,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286212334] [2021-04-15 04:27:47,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:47,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286212334] [2021-04-15 04:27:47,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740724] [2021-04-15 04:27:47,779 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 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 [2021-04-15 04:27:47,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:27:47,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:47,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:47,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:47,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-04-15 04:27:47,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:47,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:47,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:47,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-04-15 04:27:47,984 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:47,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:27:47,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:47,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:47,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:47,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-04-15 04:27:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:48,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:48,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:48,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342872446] [2021-04-15 04:27:48,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:48,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:48,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:48,019 INFO L87 Difference]: Start difference. First operand 14150 states and 58775 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:48,521 INFO L93 Difference]: Finished difference Result 22775 states and 92502 transitions. [2021-04-15 04:27:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 04:27:48,521 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 34 [2021-04-15 04:27:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:48,580 INFO L225 Difference]: With dead ends: 22775 [2021-04-15 04:27:48,580 INFO L226 Difference]: Without dead ends: 22620 [2021-04-15 04:27:48,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 335.6ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:27:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22620 states. [2021-04-15 04:27:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22620 to 14182. [2021-04-15 04:27:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14182 states, 14181 states have (on average 4.154502503349552) internal successors, (58915), 14181 states have internal predecessors, (58915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14182 states to 14182 states and 58915 transitions. [2021-04-15 04:27:49,069 INFO L78 Accepts]: Start accepts. Automaton has 14182 states and 58915 transitions. Word has length 34 [2021-04-15 04:27:49,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:49,070 INFO L480 AbstractCegarLoop]: Abstraction has 14182 states and 58915 transitions. [2021-04-15 04:27:49,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:49,070 INFO L276 IsEmpty]: Start isEmpty. Operand 14182 states and 58915 transitions. [2021-04-15 04:27:49,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:27:49,100 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:49,100 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:49,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:49,300 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:49,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:49,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1674195085, now seen corresponding path program 31 times [2021-04-15 04:27:49,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:49,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564771917] [2021-04-15 04:27:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:49,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564771917] [2021-04-15 04:27:49,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928488692] [2021-04-15 04:27:49,378 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 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 [2021-04-15 04:27:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:49,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:27:49,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:49,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-04-15 04:27:49,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:49,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:49,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:49,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-04-15 04:27:49,565 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:27:49,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:27:49,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:49,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:49,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:49,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-04-15 04:27:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:49,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:49,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:49,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191372663] [2021-04-15 04:27:49,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:49,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:49,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:49,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:49,597 INFO L87 Difference]: Start difference. First operand 14182 states and 58915 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:50,096 INFO L93 Difference]: Finished difference Result 27396 states and 111149 transitions. [2021-04-15 04:27:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 04:27:50,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 34 [2021-04-15 04:27:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:50,341 INFO L225 Difference]: With dead ends: 27396 [2021-04-15 04:27:50,341 INFO L226 Difference]: Without dead ends: 27241 [2021-04-15 04:27:50,342 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:27:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-04-15 04:27:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 14407. [2021-04-15 04:27:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14407 states, 14406 states have (on average 4.153685964181591) internal successors, (59838), 14406 states have internal predecessors, (59838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:50,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14407 states to 14407 states and 59838 transitions. [2021-04-15 04:27:50,715 INFO L78 Accepts]: Start accepts. Automaton has 14407 states and 59838 transitions. Word has length 34 [2021-04-15 04:27:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:50,715 INFO L480 AbstractCegarLoop]: Abstraction has 14407 states and 59838 transitions. [2021-04-15 04:27:50,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-04-15 04:27:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 14407 states and 59838 transitions. [2021-04-15 04:27:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:27:50,743 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:50,743 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:50,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:50,944 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -140783524, now seen corresponding path program 6 times [2021-04-15 04:27:50,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:50,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638111449] [2021-04-15 04:27:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:51,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638111449] [2021-04-15 04:27:51,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390861950] [2021-04-15 04:27:51,017 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 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 [2021-04-15 04:27:51,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:27:51,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:51,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:27:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:51,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:51,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-04-15 04:27:51,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951086211] [2021-04-15 04:27:51,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:27:51,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:27:51,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:27:51,114 INFO L87 Difference]: Start difference. First operand 14407 states and 59838 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-04-15 04:27:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:51,445 INFO L93 Difference]: Finished difference Result 22943 states and 94680 transitions. [2021-04-15 04:27:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:27:51,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 36 [2021-04-15 04:27:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:51,516 INFO L225 Difference]: With dead ends: 22943 [2021-04-15 04:27:51,517 INFO L226 Difference]: Without dead ends: 22609 [2021-04-15 04:27:51,517 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:27:51,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22609 states. [2021-04-15 04:27:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22609 to 20569. [2021-04-15 04:27:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20569 states, 20568 states have (on average 4.176244651886425) internal successors, (85897), 20568 states have internal predecessors, (85897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20569 states to 20569 states and 85897 transitions. [2021-04-15 04:27:51,978 INFO L78 Accepts]: Start accepts. Automaton has 20569 states and 85897 transitions. Word has length 36 [2021-04-15 04:27:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:51,979 INFO L480 AbstractCegarLoop]: Abstraction has 20569 states and 85897 transitions. [2021-04-15 04:27:51,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-04-15 04:27:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 20569 states and 85897 transitions. [2021-04-15 04:27:52,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:27:52,203 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:52,203 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:52,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-04-15 04:27:52,404 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:52,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1416997327, now seen corresponding path program 32 times [2021-04-15 04:27:52,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:52,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368322667] [2021-04-15 04:27:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-04-15 04:27:52,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368322667] [2021-04-15 04:27:52,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:27:52,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 04:27:52,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528903734] [2021-04-15 04:27:52,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 04:27:52,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:52,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 04:27:52,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:27:52,430 INFO L87 Difference]: Start difference. First operand 20569 states and 85897 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-04-15 04:27:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:52,639 INFO L93 Difference]: Finished difference Result 37535 states and 156218 transitions. [2021-04-15 04:27:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 04:27:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 36 [2021-04-15 04:27:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:52,763 INFO L225 Difference]: With dead ends: 37535 [2021-04-15 04:27:52,763 INFO L226 Difference]: Without dead ends: 36829 [2021-04-15 04:27:52,763 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:27:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36829 states. [2021-04-15 04:27:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36829 to 33540. [2021-04-15 04:27:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33540 states, 33539 states have (on average 4.207489788007991) internal successors, (141115), 33539 states have internal predecessors, (141115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33540 states to 33540 states and 141115 transitions. [2021-04-15 04:27:53,662 INFO L78 Accepts]: Start accepts. Automaton has 33540 states and 141115 transitions. Word has length 36 [2021-04-15 04:27:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:53,662 INFO L480 AbstractCegarLoop]: Abstraction has 33540 states and 141115 transitions. [2021-04-15 04:27:53,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-04-15 04:27:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 33540 states and 141115 transitions. [2021-04-15 04:27:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:27:53,741 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:53,741 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:53,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-04-15 04:27:53,742 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:53,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:53,742 INFO L82 PathProgramCache]: Analyzing trace with hash -656275528, now seen corresponding path program 7 times [2021-04-15 04:27:53,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:53,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091959084] [2021-04-15 04:27:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091959084] [2021-04-15 04:27:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140800206] [2021-04-15 04:27:53,867 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 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 [2021-04-15 04:27:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:53,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 04:27:53,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:54,391 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-04-15 04:27:54,392 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2021-04-15 04:27:54,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:54,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:54,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:54,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:3 [2021-04-15 04:27:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:54,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:54,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-04-15 04:27:54,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712209956] [2021-04-15 04:27:54,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 04:27:54,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:54,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 04:27:54,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-04-15 04:27:54,425 INFO L87 Difference]: Start difference. First operand 33540 states and 141115 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:55,849 INFO L93 Difference]: Finished difference Result 59772 states and 246214 transitions. [2021-04-15 04:27:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 04:27:55,850 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:27:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:56,083 INFO L225 Difference]: With dead ends: 59772 [2021-04-15 04:27:56,083 INFO L226 Difference]: Without dead ends: 58808 [2021-04-15 04:27:56,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 849.0ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:27:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58808 states. [2021-04-15 04:27:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58808 to 33468. [2021-04-15 04:27:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33468 states, 33467 states have (on average 4.193265007320644) internal successors, (140336), 33467 states have internal predecessors, (140336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33468 states to 33468 states and 140336 transitions. [2021-04-15 04:27:57,331 INFO L78 Accepts]: Start accepts. Automaton has 33468 states and 140336 transitions. Word has length 39 [2021-04-15 04:27:57,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:57,331 INFO L480 AbstractCegarLoop]: Abstraction has 33468 states and 140336 transitions. [2021-04-15 04:27:57,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:57,331 INFO L276 IsEmpty]: Start isEmpty. Operand 33468 states and 140336 transitions. [2021-04-15 04:27:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:27:57,413 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:57,413 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:57,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-04-15 04:27:57,614 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:57,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:57,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1022951253, now seen corresponding path program 33 times [2021-04-15 04:27:57,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:57,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552839347] [2021-04-15 04:27:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:57,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552839347] [2021-04-15 04:27:57,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586286598] [2021-04-15 04:27:57,876 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 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 [2021-04-15 04:27:57,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:27:57,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:57,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 04:27:57,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:58,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:27:58,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:27:58,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:27:58,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:58,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 46 [2021-04-15 04:27:58,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-04-15 04:27:59,003 INFO L628 ElimStorePlain]: treesize reduction 73, result has 35.4 percent of original size [2021-04-15 04:27:59,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:59,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:38 [2021-04-15 04:27:59,160 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 27 treesize of output 21 [2021-04-15 04:27:59,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:59,176 INFO L628 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2021-04-15 04:27:59,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:59,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-04-15 04:27:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:59,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:59,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-04-15 04:27:59,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071098923] [2021-04-15 04:27:59,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 04:27:59,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:59,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 04:27:59,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:27:59,233 INFO L87 Difference]: Start difference. First operand 33468 states and 140336 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:28:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:28:02,709 INFO L93 Difference]: Finished difference Result 77832 states and 316391 transitions. [2021-04-15 04:28:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 04:28:02,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:28:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:28:03,030 INFO L225 Difference]: With dead ends: 77832 [2021-04-15 04:28:03,030 INFO L226 Difference]: Without dead ends: 77444 [2021-04-15 04:28:03,031 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2185.4ms TimeCoverageRelationStatistics Valid=551, Invalid=3109, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 04:28:03,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77444 states. [2021-04-15 04:28:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77444 to 34685. [2021-04-15 04:28:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34685 states, 34684 states have (on average 4.195969323030792) internal successors, (145533), 34684 states have internal predecessors, (145533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:28:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34685 states to 34685 states and 145533 transitions. [2021-04-15 04:28:04,552 INFO L78 Accepts]: Start accepts. Automaton has 34685 states and 145533 transitions. Word has length 39 [2021-04-15 04:28:04,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:28:04,552 INFO L480 AbstractCegarLoop]: Abstraction has 34685 states and 145533 transitions. [2021-04-15 04:28:04,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:28:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34685 states and 145533 transitions. [2021-04-15 04:28:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:28:04,636 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:28:04,636 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:28:04,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-04-15 04:28:04,838 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:28:04,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:28:04,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1976270763, now seen corresponding path program 34 times [2021-04-15 04:28:04,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:28:04,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914924010] [2021-04-15 04:28:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:28:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:28:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:28:05,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914924010] [2021-04-15 04:28:05,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216464108] [2021-04-15 04:28:05,103 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 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 [2021-04-15 04:28:05,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:28:05,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:28:05,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 04:28:05,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:28:05,582 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-04-15 04:28:05,582 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 67 treesize of output 37 [2021-04-15 04:28:05,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:28:05,613 INFO L628 ElimStorePlain]: treesize reduction 16, result has 44.8 percent of original size [2021-04-15 04:28:05,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:28:05,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:13 [2021-04-15 04:28:05,659 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 17 treesize of output 13 [2021-04-15 04:28:05,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:28:05,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:28:05,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:28:05,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:7 [2021-04-15 04:28:05,993 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-04-15 04:28:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:28:06,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:28:06,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-04-15 04:28:06,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273965964] [2021-04-15 04:28:06,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 04:28:06,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:28:06,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 04:28:06,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-04-15 04:28:06,027 INFO L87 Difference]: Start difference. First operand 34685 states and 145533 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:28:08,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:28:08,173 INFO L93 Difference]: Finished difference Result 85928 states and 351701 transitions. [2021-04-15 04:28:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:28:08,175 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:28:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:28:08,482 INFO L225 Difference]: With dead ends: 85928 [2021-04-15 04:28:08,482 INFO L226 Difference]: Without dead ends: 85554 [2021-04-15 04:28:08,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1178.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:28:08,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85554 states. [2021-04-15 04:28:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85554 to 35149. [2021-04-15 04:28:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35149 states, 35148 states have (on average 4.186383293501764) internal successors, (147143), 35148 states have internal predecessors, (147143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:28:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35149 states to 35149 states and 147143 transitions. [2021-04-15 04:28:09,881 INFO L78 Accepts]: Start accepts. Automaton has 35149 states and 147143 transitions. Word has length 39 [2021-04-15 04:28:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:28:09,881 INFO L480 AbstractCegarLoop]: Abstraction has 35149 states and 147143 transitions. [2021-04-15 04:28:09,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:28:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 35149 states and 147143 transitions. [2021-04-15 04:28:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:28:09,956 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:28:09,956 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:28:10,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:28:10,158 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:28:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:28:10,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1473061487, now seen corresponding path program 35 times [2021-04-15 04:28:10,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:28:10,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138566439] [2021-04-15 04:28:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:28:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:28:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:28:10,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138566439] [2021-04-15 04:28:10,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891495883] [2021-04-15 04:28:10,286 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 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 [2021-04-15 04:28:10,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:28:10,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:28:10,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 04:28:10,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:28:10,628 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-04-15 04:28:10,900 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 26 treesize of output 22 [2021-04-15 04:28:10,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:28:10,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:28:10,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:28:10,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:45 [2021-04-15 04:28:10,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:28:10,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:28:10,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:28:11,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:28:11,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 88 [2021-04-15 04:28:11,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 04:28:11,147 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.1 percent of original size [2021-04-15 04:28:11,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 04:28:11,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:35 [2021-04-15 04:28:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:28:11,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:28:11,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-04-15 04:28:11,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855210299] [2021-04-15 04:28:11,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 04:28:11,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:28:11,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 04:28:11,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:28:11,228 INFO L87 Difference]: Start difference. First operand 35149 states and 147143 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:28:13,502 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-04-15 04:28:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:28:15,477 INFO L93 Difference]: Finished difference Result 132467 states and 537017 transitions. [2021-04-15 04:28:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 04:28:15,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:28:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:28:16,088 INFO L225 Difference]: With dead ends: 132467 [2021-04-15 04:28:16,088 INFO L226 Difference]: Without dead ends: 132109 [2021-04-15 04:28:16,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2334.5ms TimeCoverageRelationStatistics Valid=711, Invalid=3449, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 04:28:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132109 states. [2021-04-15 04:28:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132109 to 38584. [2021-04-15 04:28:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38584 states, 38583 states have (on average 4.202705854910193) internal successors, (162153), 38583 states have internal predecessors, (162153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:28:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38584 states to 38584 states and 162153 transitions. [2021-04-15 04:28:18,081 INFO L78 Accepts]: Start accepts. Automaton has 38584 states and 162153 transitions. Word has length 39 [2021-04-15 04:28:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:28:18,082 INFO L480 AbstractCegarLoop]: Abstraction has 38584 states and 162153 transitions. [2021-04-15 04:28:18,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:28:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 38584 states and 162153 transitions. [2021-04-15 04:28:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:28:18,164 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:28:18,164 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:28:18,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:28:18,369 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:28:18,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:28:18,370 INFO L82 PathProgramCache]: Analyzing trace with hash -497015271, now seen corresponding path program 36 times [2021-04-15 04:28:18,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:28:18,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250052239] [2021-04-15 04:28:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:28:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:28:18,833 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-04-15 04:28:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:28:18,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250052239] [2021-04-15 04:28:18,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011310819] [2021-04-15 04:28:18,921 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 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 [2021-04-15 04:28:18,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:28:18,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:28:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 04:28:18,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:28:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:28:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:28:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:28:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:28:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:28:19,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:28:19,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:28:19,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:28:19,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 69 [2021-04-15 04:28:19,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 04:28:19,269 INFO L628 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2021-04-15 04:28:19,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:28:19,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:36 [2021-04-15 04:28:19,377 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 101 treesize of output 79 [2021-04-15 04:28:20,966 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 1684 DAG size of output: 1675 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown