/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/bench/exp2x4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:39:55,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:39:55,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:39:55,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 02:39:55,850 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 02:39:55,886 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:39:55,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:39:55,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:39:55,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:39:55,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:39:55,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:39:55,890 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:39:55,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:39:55,891 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:39:55,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:39:55,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:39:55,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:39:55,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:39:55,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:39:55,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:39:55,893 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:39:55,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:39:55,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:39:55,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:39:55,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:39:55,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:39:55,893 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:39:55,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:39:55,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:39:55,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:39:55,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:39:55,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:39:55,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:39:55,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:39:55,894 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:39:55,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:39:55,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:39:56,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:39:56,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:39:56,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:39:56,235 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:39:56,248 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:39:56,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl [2021-04-15 02:39:56,250 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl' [2021-04-15 02:39:56,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:39:56,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:39:56,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:39:56,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:39:56,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:39:56,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:39:56" (1/1) ... [2021-04-15 02:39:56,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:39:56" (1/1) ... [2021-04-15 02:39:56,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:39:56,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:39:56,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:39:56,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:39:56,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:39:56" (1/1) ... [2021-04-15 02:39:56,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:39:56" (1/1) ... [2021-04-15 02:39:56,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:39:56" (1/1) ... [2021-04-15 02:39:56,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:39:56" (1/1) ... [2021-04-15 02:39:56,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:39:56" (1/1) ... [2021-04-15 02:39:56,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:39:56" (1/1) ... [2021-04-15 02:39:56,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:39:56" (1/1) ... [2021-04-15 02:39:56,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:39:56,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:39:56,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:39:56,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:39:56,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:39:56" (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 02:39:56,418 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 02:39:56,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 02:39:56,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 02:39:56,418 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 02:39:56,419 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 02:39:56,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 02:39:56,419 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:39:56,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:39:56,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:39:56,419 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 02:39:56,419 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 02:39:56,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 02:39:56,421 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-04-15 02:39:56,421 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-04-15 02:39:56,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-04-15 02:39:56,422 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 02:39:56,641 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:39:56,641 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 02:39:56,642 INFO L202 PluginConnector]: Adding new model exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:39:56 BoogieIcfgContainer [2021-04-15 02:39:56,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:39:56,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:39:56,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:39:56,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:39:56,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:39:56" (1/2) ... [2021-04-15 02:39:56,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78af20da and model type exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:39:56, skipping insertion in model container [2021-04-15 02:39:56,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:39:56" (2/2) ... [2021-04-15 02:39:56,648 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x4.wvr.bpl [2021-04-15 02:39:56,657 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:39:56,657 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:39:56,660 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:39:56,661 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:39:56,747 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-04-15 02:39:56,769 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-04-15 02:39:56,784 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:39:56,784 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:39:56,785 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:39:56,785 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:39:56,785 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:39:56,785 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:39:56,785 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:39:56,785 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:39:56,792 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 37 transitions, 106 flow [2021-04-15 02:39:56,910 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 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 02:39:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 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 02:39:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:39:56,935 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:56,936 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 02:39:56,937 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:56,942 INFO L82 PathProgramCache]: Analyzing trace with hash 500910984, now seen corresponding path program 1 times [2021-04-15 02:39:56,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:56,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549014794] [2021-04-15 02:39:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:57,138 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 02:39:57,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549014794] [2021-04-15 02:39:57,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:39:57,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 02:39:57,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067514881] [2021-04-15 02:39:57,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 02:39:57,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:57,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 02:39:57,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:39:57,164 INFO L87 Difference]: Start difference. First operand has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 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 02:39:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:57,285 INFO L93 Difference]: Finished difference Result 1365 states and 5324 transitions. [2021-04-15 02:39:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 02:39:57,288 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 02:39:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:57,320 INFO L225 Difference]: With dead ends: 1365 [2021-04-15 02:39:57,321 INFO L226 Difference]: Without dead ends: 1334 [2021-04-15 02:39:57,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:39:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-04-15 02:39:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1069. [2021-04-15 02:39:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.903558052434457) internal successors, (4169), 1068 states have internal predecessors, (4169), 0 states have call successors, (0), 0 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 02:39:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4169 transitions. [2021-04-15 02:39:57,466 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4169 transitions. Word has length 19 [2021-04-15 02:39:57,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:57,468 INFO L480 AbstractCegarLoop]: Abstraction has 1069 states and 4169 transitions. [2021-04-15 02:39:57,468 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 02:39:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4169 transitions. [2021-04-15 02:39:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:57,475 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:57,476 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 02:39:57,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:39:57,476 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:57,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1942329299, now seen corresponding path program 1 times [2021-04-15 02:39:57,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:57,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161645644] [2021-04-15 02:39:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:57,530 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 02:39:57,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161645644] [2021-04-15 02:39:57,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134885449] [2021-04-15 02:39:57,531 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 02:39:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:57,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 02:39:57,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:57,694 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 02:39:57,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:57,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-04-15 02:39:57,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416902243] [2021-04-15 02:39:57,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:39:57,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:57,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:39:57,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:39:57,698 INFO L87 Difference]: Start difference. First operand 1069 states and 4169 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 02:39:57,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:57,804 INFO L93 Difference]: Finished difference Result 2313 states and 8847 transitions. [2021-04-15 02:39:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:39:57,805 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 02:39:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:57,824 INFO L225 Difference]: With dead ends: 2313 [2021-04-15 02:39:57,824 INFO L226 Difference]: Without dead ends: 2313 [2021-04-15 02:39:57,825 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:39:57,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-04-15 02:39:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1246. [2021-04-15 02:39:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.9710843373493976) internal successors, (4944), 1245 states have internal predecessors, (4944), 0 states have call successors, (0), 0 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 02:39:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4944 transitions. [2021-04-15 02:39:57,910 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4944 transitions. Word has length 22 [2021-04-15 02:39:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:57,911 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4944 transitions. [2021-04-15 02:39:57,911 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 02:39:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4944 transitions. [2021-04-15 02:39:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:57,915 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:57,915 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 02:39:58,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 02:39:58,129 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:58,130 INFO L82 PathProgramCache]: Analyzing trace with hash -977644340, now seen corresponding path program 1 times [2021-04-15 02:39:58,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:58,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825527796] [2021-04-15 02:39:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:58,159 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 02:39:58,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825527796] [2021-04-15 02:39:58,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088602479] [2021-04-15 02:39:58,160 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 02:39:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:58,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 02:39:58,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:58,269 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 02:39:58,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:58,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-04-15 02:39:58,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267547876] [2021-04-15 02:39:58,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:39:58,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:58,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:39:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:39:58,271 INFO L87 Difference]: Start difference. First operand 1246 states and 4944 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 02:39:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:58,377 INFO L93 Difference]: Finished difference Result 2518 states and 9792 transitions. [2021-04-15 02:39:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:39:58,378 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 02:39:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:58,409 INFO L225 Difference]: With dead ends: 2518 [2021-04-15 02:39:58,409 INFO L226 Difference]: Without dead ends: 2518 [2021-04-15 02:39:58,410 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:39:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-04-15 02:39:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1535. [2021-04-15 02:39:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 4.046284224250326) internal successors, (6207), 1534 states have internal predecessors, (6207), 0 states have call successors, (0), 0 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 02:39:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6207 transitions. [2021-04-15 02:39:58,528 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6207 transitions. Word has length 22 [2021-04-15 02:39:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:58,528 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 6207 transitions. [2021-04-15 02:39:58,528 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 02:39:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6207 transitions. [2021-04-15 02:39:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:58,533 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:58,533 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 02:39:58,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:58,749 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:58,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:58,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1083698467, now seen corresponding path program 1 times [2021-04-15 02:39:58,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:58,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2767267] [2021-04-15 02:39:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:58,773 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 02:39:58,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2767267] [2021-04-15 02:39:58,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:39:58,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:39:58,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732087282] [2021-04-15 02:39:58,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:39:58,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:58,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:39:58,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:39:58,775 INFO L87 Difference]: Start difference. First operand 1535 states and 6207 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 02:39:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:58,861 INFO L93 Difference]: Finished difference Result 2143 states and 8381 transitions. [2021-04-15 02:39:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:39:58,861 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 02:39:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:58,876 INFO L225 Difference]: With dead ends: 2143 [2021-04-15 02:39:58,877 INFO L226 Difference]: Without dead ends: 2120 [2021-04-15 02:39:58,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:39:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-04-15 02:39:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1600. [2021-04-15 02:39:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.9987492182614135) internal successors, (6394), 1599 states have internal predecessors, (6394), 0 states have call successors, (0), 0 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 02:39:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 6394 transitions. [2021-04-15 02:39:58,948 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 6394 transitions. Word has length 22 [2021-04-15 02:39:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:58,949 INFO L480 AbstractCegarLoop]: Abstraction has 1600 states and 6394 transitions. [2021-04-15 02:39:58,949 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 02:39:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 6394 transitions. [2021-04-15 02:39:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:58,955 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:58,955 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 02:39:58,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 02:39:58,955 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:58,956 INFO L82 PathProgramCache]: Analyzing trace with hash 269710136, now seen corresponding path program 1 times [2021-04-15 02:39:58,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:58,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539366879] [2021-04-15 02:39:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:58,993 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 02:39:58,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539366879] [2021-04-15 02:39:58,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:39:58,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:39:58,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771202710] [2021-04-15 02:39:58,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:39:58,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:58,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:39:58,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:39:58,995 INFO L87 Difference]: Start difference. First operand 1600 states and 6394 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 02:39:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:59,068 INFO L93 Difference]: Finished difference Result 2353 states and 9126 transitions. [2021-04-15 02:39:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:39:59,068 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 02:39:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:59,083 INFO L225 Difference]: With dead ends: 2353 [2021-04-15 02:39:59,084 INFO L226 Difference]: Without dead ends: 2337 [2021-04-15 02:39:59,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:39:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-04-15 02:39:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1670. [2021-04-15 02:39:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.9622528460155784) internal successors, (6613), 1669 states have internal predecessors, (6613), 0 states have call successors, (0), 0 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 02:39:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 6613 transitions. [2021-04-15 02:39:59,188 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 6613 transitions. Word has length 22 [2021-04-15 02:39:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:59,188 INFO L480 AbstractCegarLoop]: Abstraction has 1670 states and 6613 transitions. [2021-04-15 02:39:59,188 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 02:39:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 6613 transitions. [2021-04-15 02:39:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:59,195 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:59,195 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 02:39:59,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 02:39:59,195 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:59,196 INFO L82 PathProgramCache]: Analyzing trace with hash 121894375, now seen corresponding path program 2 times [2021-04-15 02:39:59,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:59,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917446028] [2021-04-15 02:39:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:59,236 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 02:39:59,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917446028] [2021-04-15 02:39:59,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:39:59,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:39:59,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454707258] [2021-04-15 02:39:59,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:39:59,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:59,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:39:59,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:39:59,238 INFO L87 Difference]: Start difference. First operand 1670 states and 6613 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 02:39:59,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:59,311 INFO L93 Difference]: Finished difference Result 2314 states and 9023 transitions. [2021-04-15 02:39:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:39:59,311 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 02:39:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:59,326 INFO L225 Difference]: With dead ends: 2314 [2021-04-15 02:39:59,327 INFO L226 Difference]: Without dead ends: 2314 [2021-04-15 02:39:59,327 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:39:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-04-15 02:39:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1847. [2021-04-15 02:39:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 3.978331527627302) internal successors, (7344), 1846 states have internal predecessors, (7344), 0 states have call successors, (0), 0 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 02:39:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 7344 transitions. [2021-04-15 02:39:59,402 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 7344 transitions. Word has length 22 [2021-04-15 02:39:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:59,403 INFO L480 AbstractCegarLoop]: Abstraction has 1847 states and 7344 transitions. [2021-04-15 02:39:59,403 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 02:39:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 7344 transitions. [2021-04-15 02:39:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:59,410 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:59,410 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 02:39:59,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 02:39:59,410 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:59,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1727272710, now seen corresponding path program 2 times [2021-04-15 02:39:59,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:59,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181424712] [2021-04-15 02:39:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:59,430 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 02:39:59,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181424712] [2021-04-15 02:39:59,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:39:59,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:39:59,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5878496] [2021-04-15 02:39:59,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:39:59,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:59,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:39:59,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:39:59,432 INFO L87 Difference]: Start difference. First operand 1847 states and 7344 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 02:39:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:59,518 INFO L93 Difference]: Finished difference Result 2315 states and 8927 transitions. [2021-04-15 02:39:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:39:59,519 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 02:39:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:59,530 INFO L225 Difference]: With dead ends: 2315 [2021-04-15 02:39:59,530 INFO L226 Difference]: Without dead ends: 2297 [2021-04-15 02:39:59,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:39:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-04-15 02:39:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1919. [2021-04-15 02:39:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.946298227320125) internal successors, (7569), 1918 states have internal predecessors, (7569), 0 states have call successors, (0), 0 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 02:39:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 7569 transitions. [2021-04-15 02:39:59,598 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 7569 transitions. Word has length 22 [2021-04-15 02:39:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:59,598 INFO L480 AbstractCegarLoop]: Abstraction has 1919 states and 7569 transitions. [2021-04-15 02:39:59,598 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 02:39:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 7569 transitions. [2021-04-15 02:39:59,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:59,605 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:59,605 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 02:39:59,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 02:39:59,605 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1751500668, now seen corresponding path program 2 times [2021-04-15 02:39:59,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:59,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277945749] [2021-04-15 02:39:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:59,624 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 02:39:59,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277945749] [2021-04-15 02:39:59,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:39:59,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:39:59,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102306700] [2021-04-15 02:39:59,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:39:59,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:59,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:39:59,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:39:59,626 INFO L87 Difference]: Start difference. First operand 1919 states and 7569 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 02:39:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:59,684 INFO L93 Difference]: Finished difference Result 2879 states and 11172 transitions. [2021-04-15 02:39:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:39:59,685 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 02:39:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:59,696 INFO L225 Difference]: With dead ends: 2879 [2021-04-15 02:39:59,696 INFO L226 Difference]: Without dead ends: 2879 [2021-04-15 02:39:59,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:39:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-04-15 02:39:59,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2176. [2021-04-15 02:39:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.964137931034483) internal successors, (8622), 2175 states have internal predecessors, (8622), 0 states have call successors, (0), 0 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 02:39:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 8622 transitions. [2021-04-15 02:39:59,772 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 8622 transitions. Word has length 22 [2021-04-15 02:39:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:59,773 INFO L480 AbstractCegarLoop]: Abstraction has 2176 states and 8622 transitions. [2021-04-15 02:39:59,773 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 02:39:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 8622 transitions. [2021-04-15 02:39:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:59,780 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:59,780 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 02:39:59,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-04-15 02:39:59,780 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1947070755, now seen corresponding path program 2 times [2021-04-15 02:39:59,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:59,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688165434] [2021-04-15 02:39:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:59,799 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 02:39:59,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688165434] [2021-04-15 02:39:59,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:39:59,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:39:59,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331222440] [2021-04-15 02:39:59,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:39:59,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:59,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:39:59,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:39:59,800 INFO L87 Difference]: Start difference. First operand 2176 states and 8622 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 02:39:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:59,862 INFO L93 Difference]: Finished difference Result 2839 states and 10862 transitions. [2021-04-15 02:39:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:39:59,863 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 02:39:59,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:59,873 INFO L225 Difference]: With dead ends: 2839 [2021-04-15 02:39:59,873 INFO L226 Difference]: Without dead ends: 2811 [2021-04-15 02:39:59,874 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:39:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-04-15 02:39:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2291. [2021-04-15 02:39:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.9375545851528386) internal successors, (9017), 2290 states have internal predecessors, (9017), 0 states have call successors, (0), 0 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 02:39:59,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 9017 transitions. [2021-04-15 02:39:59,946 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 9017 transitions. Word has length 22 [2021-04-15 02:39:59,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:59,946 INFO L480 AbstractCegarLoop]: Abstraction has 2291 states and 9017 transitions. [2021-04-15 02:39:59,947 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 02:39:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 9017 transitions. [2021-04-15 02:39:59,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:39:59,954 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:59,954 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] [2021-04-15 02:39:59,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-04-15 02:39:59,954 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:59,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:59,955 INFO L82 PathProgramCache]: Analyzing trace with hash 509204595, now seen corresponding path program 1 times [2021-04-15 02:39:59,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:59,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726779031] [2021-04-15 02:39:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:00,010 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 02:40:00,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726779031] [2021-04-15 02:40:00,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572897208] [2021-04-15 02:40:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:40:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:00,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:40:00,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:00,279 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 02:40:00,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:00,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-04-15 02:40:00,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627038586] [2021-04-15 02:40:00,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:40:00,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:00,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:40:00,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:40:00,285 INFO L87 Difference]: Start difference. First operand 2291 states and 9017 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:00,500 INFO L93 Difference]: Finished difference Result 3791 states and 14505 transitions. [2021-04-15 02:40:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:40:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:40:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:00,516 INFO L225 Difference]: With dead ends: 3791 [2021-04-15 02:40:00,517 INFO L226 Difference]: Without dead ends: 3655 [2021-04-15 02:40:00,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:40:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2021-04-15 02:40:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2656. [2021-04-15 02:40:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 3.9450094161958567) internal successors, (10474), 2655 states have internal predecessors, (10474), 0 states have call successors, (0), 0 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 02:40:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 10474 transitions. [2021-04-15 02:40:00,628 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 10474 transitions. Word has length 25 [2021-04-15 02:40:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:00,629 INFO L480 AbstractCegarLoop]: Abstraction has 2656 states and 10474 transitions. [2021-04-15 02:40:00,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:00,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 10474 transitions. [2021-04-15 02:40:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:40:00,637 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:00,637 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] [2021-04-15 02:40:00,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 02:40:00,860 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:00,861 INFO L82 PathProgramCache]: Analyzing trace with hash 805897905, now seen corresponding path program 2 times [2021-04-15 02:40:00,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:00,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691807745] [2021-04-15 02:40:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:00,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691807745] [2021-04-15 02:40:00,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491699092] [2021-04-15 02:40:00,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:00,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:40:00,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:00,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:40:00,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:01,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:01,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-04-15 02:40:01,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670080836] [2021-04-15 02:40:01,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:40:01,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:01,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:40:01,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:40:01,213 INFO L87 Difference]: Start difference. First operand 2656 states and 10474 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 02:40:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:01,647 INFO L93 Difference]: Finished difference Result 4004 states and 15422 transitions. [2021-04-15 02:40:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:40:01,648 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 25 [2021-04-15 02:40:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:01,665 INFO L225 Difference]: With dead ends: 4004 [2021-04-15 02:40:01,666 INFO L226 Difference]: Without dead ends: 3868 [2021-04-15 02:40:01,666 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:40:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-04-15 02:40:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 2991. [2021-04-15 02:40:01,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.9638795986622073) internal successors, (11852), 2990 states have internal predecessors, (11852), 0 states have call successors, (0), 0 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 02:40:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 11852 transitions. [2021-04-15 02:40:01,768 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 11852 transitions. Word has length 25 [2021-04-15 02:40:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:01,768 INFO L480 AbstractCegarLoop]: Abstraction has 2991 states and 11852 transitions. [2021-04-15 02:40:01,769 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 02:40:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 11852 transitions. [2021-04-15 02:40:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:40:01,779 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:01,779 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] [2021-04-15 02:40:01,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:01,980 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:01,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1407841221, now seen corresponding path program 3 times [2021-04-15 02:40:01,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:01,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765801272] [2021-04-15 02:40:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:40:02,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765801272] [2021-04-15 02:40:02,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:40:02,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:40:02,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99601820] [2021-04-15 02:40:02,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:40:02,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:02,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:40:02,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:40:02,047 INFO L87 Difference]: Start difference. First operand 2991 states and 11852 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 02:40:02,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:02,190 INFO L93 Difference]: Finished difference Result 4207 states and 16326 transitions. [2021-04-15 02:40:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:40:02,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:40:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:02,208 INFO L225 Difference]: With dead ends: 4207 [2021-04-15 02:40:02,208 INFO L226 Difference]: Without dead ends: 4139 [2021-04-15 02:40:02,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:40:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-04-15 02:40:02,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3438. [2021-04-15 02:40:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.9793424498108814) internal successors, (13677), 3437 states have internal predecessors, (13677), 0 states have call successors, (0), 0 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 02:40:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13677 transitions. [2021-04-15 02:40:02,349 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13677 transitions. Word has length 25 [2021-04-15 02:40:02,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:02,349 INFO L480 AbstractCegarLoop]: Abstraction has 3438 states and 13677 transitions. [2021-04-15 02:40:02,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 02:40:02,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13677 transitions. [2021-04-15 02:40:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:40:02,360 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:02,360 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] [2021-04-15 02:40:02,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-04-15 02:40:02,361 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:02,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:02,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1668338337, now seen corresponding path program 1 times [2021-04-15 02:40:02,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:02,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030347619] [2021-04-15 02:40:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:02,432 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 02:40:02,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030347619] [2021-04-15 02:40:02,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263285881] [2021-04-15 02:40:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:02,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:40:02,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:02,628 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 02:40:02,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:02,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-04-15 02:40:02,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068758487] [2021-04-15 02:40:02,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:40:02,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:02,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:40:02,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:40:02,630 INFO L87 Difference]: Start difference. First operand 3438 states and 13677 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:02,865 INFO L93 Difference]: Finished difference Result 4729 states and 18310 transitions. [2021-04-15 02:40:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:40:02,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:40:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:02,885 INFO L225 Difference]: With dead ends: 4729 [2021-04-15 02:40:02,885 INFO L226 Difference]: Without dead ends: 4627 [2021-04-15 02:40:02,886 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:40:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-04-15 02:40:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3870. [2021-04-15 02:40:03,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 3.958904109589041) internal successors, (15317), 3869 states have internal predecessors, (15317), 0 states have call successors, (0), 0 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 02:40:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 15317 transitions. [2021-04-15 02:40:03,016 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 15317 transitions. Word has length 25 [2021-04-15 02:40:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:03,017 INFO L480 AbstractCegarLoop]: Abstraction has 3870 states and 15317 transitions. [2021-04-15 02:40:03,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 15317 transitions. [2021-04-15 02:40:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:40:03,028 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:03,028 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] [2021-04-15 02:40:03,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 02:40:03,241 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:03,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:03,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2074425317, now seen corresponding path program 2 times [2021-04-15 02:40:03,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:03,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727414006] [2021-04-15 02:40:03,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:03,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727414006] [2021-04-15 02:40:03,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100311644] [2021-04-15 02:40:03,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:40:03,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:40:03,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:03,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:40:03,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:03,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:03,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-04-15 02:40:03,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952581627] [2021-04-15 02:40:03,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:40:03,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:03,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:40:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:40:03,617 INFO L87 Difference]: Start difference. First operand 3870 states and 15317 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:03,899 INFO L93 Difference]: Finished difference Result 4946 states and 19222 transitions. [2021-04-15 02:40:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:40:03,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:40:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:03,917 INFO L225 Difference]: With dead ends: 4946 [2021-04-15 02:40:03,918 INFO L226 Difference]: Without dead ends: 4844 [2021-04-15 02:40:03,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:40:03,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2021-04-15 02:40:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4195. [2021-04-15 02:40:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 3.966618979494516) internal successors, (16636), 4194 states have internal predecessors, (16636), 0 states have call successors, (0), 0 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 02:40:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 16636 transitions. [2021-04-15 02:40:04,068 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 16636 transitions. Word has length 25 [2021-04-15 02:40:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:04,069 INFO L480 AbstractCegarLoop]: Abstraction has 4195 states and 16636 transitions. [2021-04-15 02:40:04,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 16636 transitions. [2021-04-15 02:40:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:40:04,082 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:04,082 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] [2021-04-15 02:40:04,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:04,307 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:04,307 INFO L82 PathProgramCache]: Analyzing trace with hash -256616277, now seen corresponding path program 3 times [2021-04-15 02:40:04,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:04,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837053914] [2021-04-15 02:40:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:40:04,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837053914] [2021-04-15 02:40:04,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:40:04,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:40:04,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64806260] [2021-04-15 02:40:04,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:40:04,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:04,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:40:04,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:40:04,357 INFO L87 Difference]: Start difference. First operand 4195 states and 16636 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 02:40:04,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:04,535 INFO L93 Difference]: Finished difference Result 5169 states and 20167 transitions. [2021-04-15 02:40:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:40:04,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:40:04,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:04,553 INFO L225 Difference]: With dead ends: 5169 [2021-04-15 02:40:04,553 INFO L226 Difference]: Without dead ends: 5118 [2021-04-15 02:40:04,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:40:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-04-15 02:40:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4611. [2021-04-15 02:40:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 3.9731019522776574) internal successors, (18316), 4610 states have internal predecessors, (18316), 0 states have call successors, (0), 0 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 02:40:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 18316 transitions. [2021-04-15 02:40:04,706 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 18316 transitions. Word has length 25 [2021-04-15 02:40:04,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:04,706 INFO L480 AbstractCegarLoop]: Abstraction has 4611 states and 18316 transitions. [2021-04-15 02:40:04,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 02:40:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 18316 transitions. [2021-04-15 02:40:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:04,719 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:04,719 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] [2021-04-15 02:40:04,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-04-15 02:40:04,719 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:04,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1347954008, now seen corresponding path program 4 times [2021-04-15 02:40:04,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:04,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423749780] [2021-04-15 02:40:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:04,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423749780] [2021-04-15 02:40:04,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273284206] [2021-04-15 02:40:04,760 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 02:40:04,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:40:04,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:04,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:04,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:04,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:04,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 02:40:04,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421383692] [2021-04-15 02:40:04,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:04,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:04,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:04,920 INFO L87 Difference]: Start difference. First operand 4611 states and 18316 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:05,933 INFO L93 Difference]: Finished difference Result 11402 states and 44327 transitions. [2021-04-15 02:40:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:40:05,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-04-15 02:40:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:05,971 INFO L225 Difference]: With dead ends: 11402 [2021-04-15 02:40:05,971 INFO L226 Difference]: Without dead ends: 11402 [2021-04-15 02:40:05,972 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:40:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-04-15 02:40:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 5821. [2021-04-15 02:40:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 4.016151202749141) internal successors, (23374), 5820 states have internal predecessors, (23374), 0 states have call successors, (0), 0 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 02:40:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 23374 transitions. [2021-04-15 02:40:06,226 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 23374 transitions. Word has length 28 [2021-04-15 02:40:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:06,227 INFO L480 AbstractCegarLoop]: Abstraction has 5821 states and 23374 transitions. [2021-04-15 02:40:06,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 23374 transitions. [2021-04-15 02:40:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:06,245 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:06,245 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] [2021-04-15 02:40:06,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 02:40:06,463 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:06,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1763427731, now seen corresponding path program 5 times [2021-04-15 02:40:06,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:06,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431241351] [2021-04-15 02:40:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:06,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431241351] [2021-04-15 02:40:06,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939672647] [2021-04-15 02:40:06,519 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 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 02:40:06,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:40:06,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:06,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:06,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:06,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:06,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 02:40:06,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224111710] [2021-04-15 02:40:06,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:06,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:06,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:06,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:06,660 INFO L87 Difference]: Start difference. First operand 5821 states and 23374 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:07,495 INFO L93 Difference]: Finished difference Result 15383 states and 58771 transitions. [2021-04-15 02:40:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:40:07,495 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-04-15 02:40:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:07,550 INFO L225 Difference]: With dead ends: 15383 [2021-04-15 02:40:07,550 INFO L226 Difference]: Without dead ends: 15203 [2021-04-15 02:40:07,552 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:40:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15203 states. [2021-04-15 02:40:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15203 to 8319. [2021-04-15 02:40:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.118177446501563) internal successors, (34255), 8318 states have internal predecessors, (34255), 0 states have call successors, (0), 0 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 02:40:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34255 transitions. [2021-04-15 02:40:07,904 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34255 transitions. Word has length 28 [2021-04-15 02:40:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:07,905 INFO L480 AbstractCegarLoop]: Abstraction has 8319 states and 34255 transitions. [2021-04-15 02:40:07,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34255 transitions. [2021-04-15 02:40:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:07,927 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:07,927 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] [2021-04-15 02:40:08,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 02:40:08,145 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1546556397, now seen corresponding path program 6 times [2021-04-15 02:40:08,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:08,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629398888] [2021-04-15 02:40:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:08,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629398888] [2021-04-15 02:40:08,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723590050] [2021-04-15 02:40:08,183 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 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 02:40:08,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:40:08,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:08,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:08,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:08,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:08,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:40:08,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730691247] [2021-04-15 02:40:08,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:40:08,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:08,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:40:08,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:40:08,342 INFO L87 Difference]: Start difference. First operand 8319 states and 34255 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:08,889 INFO L93 Difference]: Finished difference Result 16184 states and 62633 transitions. [2021-04-15 02:40:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:40:08,890 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:08,928 INFO L225 Difference]: With dead ends: 16184 [2021-04-15 02:40:08,928 INFO L226 Difference]: Without dead ends: 16184 [2021-04-15 02:40:08,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:40:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2021-04-15 02:40:09,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 8319. [2021-04-15 02:40:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.099062274585237) internal successors, (34096), 8318 states have internal predecessors, (34096), 0 states have call successors, (0), 0 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 02:40:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34096 transitions. [2021-04-15 02:40:09,242 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34096 transitions. Word has length 28 [2021-04-15 02:40:09,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:09,242 INFO L480 AbstractCegarLoop]: Abstraction has 8319 states and 34096 transitions. [2021-04-15 02:40:09,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34096 transitions. [2021-04-15 02:40:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:09,260 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:09,261 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] [2021-04-15 02:40:09,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 02:40:09,477 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:09,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2142952270, now seen corresponding path program 7 times [2021-04-15 02:40:09,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:09,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648379929] [2021-04-15 02:40:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:09,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648379929] [2021-04-15 02:40:09,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064890022] [2021-04-15 02:40:09,507 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 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 02:40:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:09,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:09,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:09,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:40:09,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377115842] [2021-04-15 02:40:09,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:40:09,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:09,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:40:09,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:40:09,629 INFO L87 Difference]: Start difference. First operand 8319 states and 34096 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:09,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:09,938 INFO L93 Difference]: Finished difference Result 10083 states and 39959 transitions. [2021-04-15 02:40:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:40:09,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:10,023 INFO L225 Difference]: With dead ends: 10083 [2021-04-15 02:40:10,023 INFO L226 Difference]: Without dead ends: 10027 [2021-04-15 02:40:10,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:40:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10027 states. [2021-04-15 02:40:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10027 to 8326. [2021-04-15 02:40:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 4.095975975975976) internal successors, (34099), 8325 states have internal predecessors, (34099), 0 states have call successors, (0), 0 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 02:40:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 34099 transitions. [2021-04-15 02:40:10,274 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 34099 transitions. Word has length 28 [2021-04-15 02:40:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:10,274 INFO L480 AbstractCegarLoop]: Abstraction has 8326 states and 34099 transitions. [2021-04-15 02:40:10,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 34099 transitions. [2021-04-15 02:40:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:10,291 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:10,291 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] [2021-04-15 02:40:10,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:10,492 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:10,492 INFO L82 PathProgramCache]: Analyzing trace with hash -270034728, now seen corresponding path program 8 times [2021-04-15 02:40:10,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:10,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133247917] [2021-04-15 02:40:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:10,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133247917] [2021-04-15 02:40:10,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266668836] [2021-04-15 02:40:10,533 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 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 02:40:10,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:40:10,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:10,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:10,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:10,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:10,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-04-15 02:40:10,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646193471] [2021-04-15 02:40:10,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:10,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:10,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:10,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:10,700 INFO L87 Difference]: Start difference. First operand 8326 states and 34099 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 02:40:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:11,300 INFO L93 Difference]: Finished difference Result 17529 states and 67736 transitions. [2021-04-15 02:40:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:40:11,301 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 28 [2021-04-15 02:40:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:11,356 INFO L225 Difference]: With dead ends: 17529 [2021-04-15 02:40:11,356 INFO L226 Difference]: Without dead ends: 17529 [2021-04-15 02:40:11,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:40:11,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17529 states. [2021-04-15 02:40:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17529 to 8432. [2021-04-15 02:40:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.087296880559839) internal successors, (34460), 8431 states have internal predecessors, (34460), 0 states have call successors, (0), 0 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 02:40:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34460 transitions. [2021-04-15 02:40:11,624 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34460 transitions. Word has length 28 [2021-04-15 02:40:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:11,624 INFO L480 AbstractCegarLoop]: Abstraction has 8432 states and 34460 transitions. [2021-04-15 02:40:11,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 02:40:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34460 transitions. [2021-04-15 02:40:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:11,711 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:11,711 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] [2021-04-15 02:40:11,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:11,913 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:11,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:11,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2015724689, now seen corresponding path program 9 times [2021-04-15 02:40:11,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:11,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986872436] [2021-04-15 02:40:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:11,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986872436] [2021-04-15 02:40:11,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921075287] [2021-04-15 02:40:11,947 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 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 02:40:11,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:40:11,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:11,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:11,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:12,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:12,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-04-15 02:40:12,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140942610] [2021-04-15 02:40:12,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:12,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:12,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:12,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:12,101 INFO L87 Difference]: Start difference. First operand 8432 states and 34460 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:12,649 INFO L93 Difference]: Finished difference Result 15647 states and 60285 transitions. [2021-04-15 02:40:12,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:40:12,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:12,686 INFO L225 Difference]: With dead ends: 15647 [2021-04-15 02:40:12,686 INFO L226 Difference]: Without dead ends: 15587 [2021-04-15 02:40:12,686 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:40:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15587 states. [2021-04-15 02:40:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15587 to 8432. [2021-04-15 02:40:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.084924682718539) internal successors, (34440), 8431 states have internal predecessors, (34440), 0 states have call successors, (0), 0 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 02:40:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34440 transitions. [2021-04-15 02:40:12,898 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34440 transitions. Word has length 28 [2021-04-15 02:40:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:12,899 INFO L480 AbstractCegarLoop]: Abstraction has 8432 states and 34440 transitions. [2021-04-15 02:40:12,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34440 transitions. [2021-04-15 02:40:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:12,914 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:12,914 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] [2021-04-15 02:40:13,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:13,116 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:13,117 INFO L82 PathProgramCache]: Analyzing trace with hash 946388915, now seen corresponding path program 10 times [2021-04-15 02:40:13,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:13,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954783744] [2021-04-15 02:40:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954783744] [2021-04-15 02:40:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858816763] [2021-04-15 02:40:13,145 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 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 02:40:13,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:40:13,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:13,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:13,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:13,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:13,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-04-15 02:40:13,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345751578] [2021-04-15 02:40:13,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:13,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:13,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:13,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:13,285 INFO L87 Difference]: Start difference. First operand 8432 states and 34440 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:13,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:13,954 INFO L93 Difference]: Finished difference Result 18798 states and 72632 transitions. [2021-04-15 02:40:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:40:13,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:13,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:14,005 INFO L225 Difference]: With dead ends: 18798 [2021-04-15 02:40:14,005 INFO L226 Difference]: Without dead ends: 18798 [2021-04-15 02:40:14,005 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:40:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18798 states. [2021-04-15 02:40:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18798 to 8538. [2021-04-15 02:40:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.08269884034204) internal successors, (34854), 8537 states have internal predecessors, (34854), 0 states have call successors, (0), 0 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 02:40:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34854 transitions. [2021-04-15 02:40:14,268 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34854 transitions. Word has length 28 [2021-04-15 02:40:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:14,268 INFO L480 AbstractCegarLoop]: Abstraction has 8538 states and 34854 transitions. [2021-04-15 02:40:14,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:14,268 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34854 transitions. [2021-04-15 02:40:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:14,284 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:14,284 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] [2021-04-15 02:40:14,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 02:40:14,485 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1542784788, now seen corresponding path program 11 times [2021-04-15 02:40:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:14,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308101505] [2021-04-15 02:40:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:14,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308101505] [2021-04-15 02:40:14,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612058700] [2021-04-15 02:40:14,516 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 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 02:40:14,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:40:14,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:14,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:14,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:14,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-04-15 02:40:14,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806582425] [2021-04-15 02:40:14,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:14,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:14,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:14,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:14,658 INFO L87 Difference]: Start difference. First operand 8538 states and 34854 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:15,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:15,204 INFO L93 Difference]: Finished difference Result 14070 states and 54143 transitions. [2021-04-15 02:40:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:40:15,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:15,250 INFO L225 Difference]: With dead ends: 14070 [2021-04-15 02:40:15,250 INFO L226 Difference]: Without dead ends: 14014 [2021-04-15 02:40:15,251 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:40:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14014 states. [2021-04-15 02:40:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14014 to 8538. [2021-04-15 02:40:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.080356096989575) internal successors, (34834), 8537 states have internal predecessors, (34834), 0 states have call successors, (0), 0 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 02:40:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34834 transitions. [2021-04-15 02:40:15,529 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34834 transitions. Word has length 28 [2021-04-15 02:40:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:15,529 INFO L480 AbstractCegarLoop]: Abstraction has 8538 states and 34834 transitions. [2021-04-15 02:40:15,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34834 transitions. [2021-04-15 02:40:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:15,547 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:15,547 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] [2021-04-15 02:40:15,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:15,767 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:15,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:15,767 INFO L82 PathProgramCache]: Analyzing trace with hash 477986465, now seen corresponding path program 12 times [2021-04-15 02:40:15,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:15,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358929340] [2021-04-15 02:40:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:15,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358929340] [2021-04-15 02:40:15,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87413742] [2021-04-15 02:40:15,810 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 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 02:40:15,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:40:15,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:15,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:15,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:15,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:15,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 02:40:15,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280493405] [2021-04-15 02:40:15,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:40:15,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:15,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:40:15,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:40:15,938 INFO L87 Difference]: Start difference. First operand 8538 states and 34834 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:16,755 INFO L93 Difference]: Finished difference Result 18926 states and 73169 transitions. [2021-04-15 02:40:16,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:40:16,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:16,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:16,799 INFO L225 Difference]: With dead ends: 18926 [2021-04-15 02:40:16,799 INFO L226 Difference]: Without dead ends: 18926 [2021-04-15 02:40:16,799 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:40:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2021-04-15 02:40:17,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 8689. [2021-04-15 02:40:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 8688 states have (on average 4.058586556169429) internal successors, (35261), 8688 states have internal predecessors, (35261), 0 states have call successors, (0), 0 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 02:40:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 35261 transitions. [2021-04-15 02:40:17,049 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 35261 transitions. Word has length 28 [2021-04-15 02:40:17,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:17,050 INFO L480 AbstractCegarLoop]: Abstraction has 8689 states and 35261 transitions. [2021-04-15 02:40:17,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 35261 transitions. [2021-04-15 02:40:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:17,140 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:17,140 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] [2021-04-15 02:40:17,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-04-15 02:40:17,356 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:17,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:17,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1479976792, now seen corresponding path program 13 times [2021-04-15 02:40:17,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:17,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494512767] [2021-04-15 02:40:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:17,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494512767] [2021-04-15 02:40:17,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434910879] [2021-04-15 02:40:17,399 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 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 02:40:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:17,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:17,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:17,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:17,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 02:40:17,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905400434] [2021-04-15 02:40:17,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:40:17,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:17,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:40:17,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:40:17,540 INFO L87 Difference]: Start difference. First operand 8689 states and 35261 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:18,108 INFO L93 Difference]: Finished difference Result 12612 states and 48542 transitions. [2021-04-15 02:40:18,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:40:18,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:18,142 INFO L225 Difference]: With dead ends: 12612 [2021-04-15 02:40:18,142 INFO L226 Difference]: Without dead ends: 12556 [2021-04-15 02:40:18,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:40:18,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12556 states. [2021-04-15 02:40:18,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12556 to 8811. [2021-04-15 02:40:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.050397275822928) internal successors, (35684), 8810 states have internal predecessors, (35684), 0 states have call successors, (0), 0 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 02:40:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35684 transitions. [2021-04-15 02:40:18,374 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35684 transitions. Word has length 28 [2021-04-15 02:40:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:18,375 INFO L480 AbstractCegarLoop]: Abstraction has 8811 states and 35684 transitions. [2021-04-15 02:40:18,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35684 transitions. [2021-04-15 02:40:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:18,391 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:18,391 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] [2021-04-15 02:40:18,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:18,592 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash -549507314, now seen corresponding path program 14 times [2021-04-15 02:40:18,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:18,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103864356] [2021-04-15 02:40:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:18,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103864356] [2021-04-15 02:40:18,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625273231] [2021-04-15 02:40:18,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:40:18,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:40:18,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:18,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:18,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:18,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:18,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:40:18,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146731110] [2021-04-15 02:40:18,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:40:18,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:18,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:40:18,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:40:18,786 INFO L87 Difference]: Start difference. First operand 8811 states and 35684 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 02:40:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:19,282 INFO L93 Difference]: Finished difference Result 16530 states and 63291 transitions. [2021-04-15 02:40:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:40:19,282 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 28 [2021-04-15 02:40:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:19,331 INFO L225 Difference]: With dead ends: 16530 [2021-04-15 02:40:19,331 INFO L226 Difference]: Without dead ends: 16530 [2021-04-15 02:40:19,331 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:40:19,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-04-15 02:40:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 8811. [2021-04-15 02:40:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.044381384790011) internal successors, (35631), 8810 states have internal predecessors, (35631), 0 states have call successors, (0), 0 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 02:40:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35631 transitions. [2021-04-15 02:40:19,566 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35631 transitions. Word has length 28 [2021-04-15 02:40:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:19,566 INFO L480 AbstractCegarLoop]: Abstraction has 8811 states and 35631 transitions. [2021-04-15 02:40:19,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 02:40:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35631 transitions. [2021-04-15 02:40:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:19,582 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:19,582 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] [2021-04-15 02:40:19,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 02:40:19,789 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:19,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:19,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1999770021, now seen corresponding path program 15 times [2021-04-15 02:40:19,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:19,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002608064] [2021-04-15 02:40:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:19,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002608064] [2021-04-15 02:40:19,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998632239] [2021-04-15 02:40:19,832 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 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 02:40:19,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:40:19,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:19,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:19,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:19,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:19,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:40:19,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390225341] [2021-04-15 02:40:19,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:40:19,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:19,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:40:19,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:40:19,950 INFO L87 Difference]: Start difference. First operand 8811 states and 35631 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:20,332 INFO L93 Difference]: Finished difference Result 11652 states and 45517 transitions. [2021-04-15 02:40:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:40:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:20,357 INFO L225 Difference]: With dead ends: 11652 [2021-04-15 02:40:20,357 INFO L226 Difference]: Without dead ends: 11632 [2021-04-15 02:40:20,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:40:20,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11632 states. [2021-04-15 02:40:20,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11632 to 8811. [2021-04-15 02:40:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.043246311010216) internal successors, (35621), 8810 states have internal predecessors, (35621), 0 states have call successors, (0), 0 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 02:40:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35621 transitions. [2021-04-15 02:40:20,524 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35621 transitions. Word has length 28 [2021-04-15 02:40:20,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:20,524 INFO L480 AbstractCegarLoop]: Abstraction has 8811 states and 35621 transitions. [2021-04-15 02:40:20,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:20,524 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35621 transitions. [2021-04-15 02:40:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:20,538 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:20,538 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] [2021-04-15 02:40:20,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 02:40:20,739 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:20,739 INFO L82 PathProgramCache]: Analyzing trace with hash 666916329, now seen corresponding path program 16 times [2021-04-15 02:40:20,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:20,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913839842] [2021-04-15 02:40:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:20,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913839842] [2021-04-15 02:40:20,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298840854] [2021-04-15 02:40:20,765 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 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 02:40:20,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:40:20,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:20,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:20,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:20,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:40:20,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076674755] [2021-04-15 02:40:20,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:40:20,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:20,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:40:20,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:40:20,893 INFO L87 Difference]: Start difference. First operand 8811 states and 35621 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:21,416 INFO L93 Difference]: Finished difference Result 13573 states and 53112 transitions. [2021-04-15 02:40:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:40:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:21,462 INFO L225 Difference]: With dead ends: 13573 [2021-04-15 02:40:21,462 INFO L226 Difference]: Without dead ends: 13573 [2021-04-15 02:40:21,462 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:40:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13573 states. [2021-04-15 02:40:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13573 to 8864. [2021-04-15 02:40:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.042423558614464) internal successors, (35828), 8863 states have internal predecessors, (35828), 0 states have call successors, (0), 0 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 02:40:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35828 transitions. [2021-04-15 02:40:21,680 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35828 transitions. Word has length 28 [2021-04-15 02:40:21,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:21,680 INFO L480 AbstractCegarLoop]: Abstraction has 8864 states and 35828 transitions. [2021-04-15 02:40:21,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35828 transitions. [2021-04-15 02:40:21,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:21,696 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:21,697 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] [2021-04-15 02:40:21,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 02:40:21,904 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:21,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:21,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1263312202, now seen corresponding path program 17 times [2021-04-15 02:40:21,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:21,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977202763] [2021-04-15 02:40:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:21,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977202763] [2021-04-15 02:40:21,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661134844] [2021-04-15 02:40:21,931 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 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 02:40:21,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:40:21,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:21,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:21,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:22,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:22,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:40:22,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396603035] [2021-04-15 02:40:22,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:40:22,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:22,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:40:22,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:40:22,034 INFO L87 Difference]: Start difference. First operand 8864 states and 35828 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:22,429 INFO L93 Difference]: Finished difference Result 14465 states and 55050 transitions. [2021-04-15 02:40:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:40:22,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:22,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:22,465 INFO L225 Difference]: With dead ends: 14465 [2021-04-15 02:40:22,466 INFO L226 Difference]: Without dead ends: 14437 [2021-04-15 02:40:22,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:40:22,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14437 states. [2021-04-15 02:40:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14437 to 8864. [2021-04-15 02:40:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.0412952724811015) internal successors, (35818), 8863 states have internal predecessors, (35818), 0 states have call successors, (0), 0 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 02:40:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35818 transitions. [2021-04-15 02:40:22,750 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35818 transitions. Word has length 28 [2021-04-15 02:40:22,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:22,751 INFO L480 AbstractCegarLoop]: Abstraction has 8864 states and 35818 transitions. [2021-04-15 02:40:22,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35818 transitions. [2021-04-15 02:40:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:22,765 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:22,765 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] [2021-04-15 02:40:22,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 02:40:22,966 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:22,966 INFO L82 PathProgramCache]: Analyzing trace with hash 198513879, now seen corresponding path program 18 times [2021-04-15 02:40:22,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:22,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557736134] [2021-04-15 02:40:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:23,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557736134] [2021-04-15 02:40:23,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285375660] [2021-04-15 02:40:23,007 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 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 02:40:23,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:40:23,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:23,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:23,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:23,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:23,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-04-15 02:40:23,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638147308] [2021-04-15 02:40:23,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:23,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:23,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:23,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:23,128 INFO L87 Difference]: Start difference. First operand 8864 states and 35818 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:23,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:23,846 INFO L93 Difference]: Finished difference Result 17059 states and 67264 transitions. [2021-04-15 02:40:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:40:23,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:23,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:23,892 INFO L225 Difference]: With dead ends: 17059 [2021-04-15 02:40:23,892 INFO L226 Difference]: Without dead ends: 17059 [2021-04-15 02:40:23,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:40:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17059 states. [2021-04-15 02:40:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17059 to 8917. [2021-04-15 02:40:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.040489008524002) internal successors, (36025), 8916 states have internal predecessors, (36025), 0 states have call successors, (0), 0 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 02:40:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36025 transitions. [2021-04-15 02:40:24,103 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36025 transitions. Word has length 28 [2021-04-15 02:40:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:24,103 INFO L480 AbstractCegarLoop]: Abstraction has 8917 states and 36025 transitions. [2021-04-15 02:40:24,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36025 transitions. [2021-04-15 02:40:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:24,116 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:24,116 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] [2021-04-15 02:40:24,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:24,317 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:24,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1200504206, now seen corresponding path program 19 times [2021-04-15 02:40:24,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:24,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98112471] [2021-04-15 02:40:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:24,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98112471] [2021-04-15 02:40:24,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286763143] [2021-04-15 02:40:24,361 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 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 02:40:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:24,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:24,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:24,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:24,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-04-15 02:40:24,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020577432] [2021-04-15 02:40:24,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:24,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:24,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:24,479 INFO L87 Difference]: Start difference. First operand 8917 states and 36025 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:25,129 INFO L93 Difference]: Finished difference Result 17336 states and 65142 transitions. [2021-04-15 02:40:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:40:25,130 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:25,172 INFO L225 Difference]: With dead ends: 17336 [2021-04-15 02:40:25,172 INFO L226 Difference]: Without dead ends: 17224 [2021-04-15 02:40:25,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:40:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17224 states. [2021-04-15 02:40:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17224 to 8917. [2021-04-15 02:40:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.039367429340511) internal successors, (36015), 8916 states have internal predecessors, (36015), 0 states have call successors, (0), 0 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 02:40:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36015 transitions. [2021-04-15 02:40:25,488 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36015 transitions. Word has length 28 [2021-04-15 02:40:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:25,489 INFO L480 AbstractCegarLoop]: Abstraction has 8917 states and 36015 transitions. [2021-04-15 02:40:25,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36015 transitions. [2021-04-15 02:40:25,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:25,505 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:25,505 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] [2021-04-15 02:40:25,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:25,709 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1319877997, now seen corresponding path program 20 times [2021-04-15 02:40:25,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:25,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535971279] [2021-04-15 02:40:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:25,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535971279] [2021-04-15 02:40:25,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735495068] [2021-04-15 02:40:25,749 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 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 02:40:25,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:40:25,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:25,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:25,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:25,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 02:40:25,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978018953] [2021-04-15 02:40:25,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:25,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:25,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:25,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:25,882 INFO L87 Difference]: Start difference. First operand 8917 states and 36015 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:26,680 INFO L93 Difference]: Finished difference Result 13676 states and 54158 transitions. [2021-04-15 02:40:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:40:26,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-04-15 02:40:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:26,717 INFO L225 Difference]: With dead ends: 13676 [2021-04-15 02:40:26,717 INFO L226 Difference]: Without dead ends: 13676 [2021-04-15 02:40:26,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 331.9ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:40:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13676 states. [2021-04-15 02:40:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13676 to 9131. [2021-04-15 02:40:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9130 states have (on average 4.022562979189485) internal successors, (36726), 9130 states have internal predecessors, (36726), 0 states have call successors, (0), 0 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 02:40:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 36726 transitions. [2021-04-15 02:40:26,928 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 36726 transitions. Word has length 28 [2021-04-15 02:40:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:26,928 INFO L480 AbstractCegarLoop]: Abstraction has 9131 states and 36726 transitions. [2021-04-15 02:40:26,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 36726 transitions. [2021-04-15 02:40:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:26,945 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:26,945 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] [2021-04-15 02:40:27,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-04-15 02:40:27,146 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:27,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1439601334, now seen corresponding path program 21 times [2021-04-15 02:40:27,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:27,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467265674] [2021-04-15 02:40:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:27,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467265674] [2021-04-15 02:40:27,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747681963] [2021-04-15 02:40:27,182 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 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 02:40:27,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:40:27,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:27,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:27,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:27,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 02:40:27,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382580891] [2021-04-15 02:40:27,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:27,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:27,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:27,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:27,288 INFO L87 Difference]: Start difference. First operand 9131 states and 36726 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:27,854 INFO L93 Difference]: Finished difference Result 15155 states and 56901 transitions. [2021-04-15 02:40:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:40:27,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-04-15 02:40:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:27,892 INFO L225 Difference]: With dead ends: 15155 [2021-04-15 02:40:27,892 INFO L226 Difference]: Without dead ends: 15043 [2021-04-15 02:40:27,893 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:40:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15043 states. [2021-04-15 02:40:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15043 to 9347. [2021-04-15 02:40:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9347 states, 9346 states have (on average 4.008238818745988) internal successors, (37461), 9346 states have internal predecessors, (37461), 0 states have call successors, (0), 0 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 02:40:28,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9347 states to 9347 states and 37461 transitions. [2021-04-15 02:40:28,184 INFO L78 Accepts]: Start accepts. Automaton has 9347 states and 37461 transitions. Word has length 28 [2021-04-15 02:40:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:28,184 INFO L480 AbstractCegarLoop]: Abstraction has 9347 states and 37461 transitions. [2021-04-15 02:40:28,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:28,185 INFO L276 IsEmpty]: Start isEmpty. Operand 9347 states and 37461 transitions. [2021-04-15 02:40:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:28,200 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:28,200 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] [2021-04-15 02:40:28,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:28,402 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:28,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1045336016, now seen corresponding path program 22 times [2021-04-15 02:40:28,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:28,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995834548] [2021-04-15 02:40:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:28,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995834548] [2021-04-15 02:40:28,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828425283] [2021-04-15 02:40:28,433 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 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 02:40:28,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:40:28,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:28,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:28,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:28,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:28,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 02:40:28,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181287976] [2021-04-15 02:40:28,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:40:28,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:28,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:40:28,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:40:28,572 INFO L87 Difference]: Start difference. First operand 9347 states and 37461 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 02:40:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:29,401 INFO L93 Difference]: Finished difference Result 16354 states and 63144 transitions. [2021-04-15 02:40:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:40:29,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 28 [2021-04-15 02:40:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:29,445 INFO L225 Difference]: With dead ends: 16354 [2021-04-15 02:40:29,445 INFO L226 Difference]: Without dead ends: 16354 [2021-04-15 02:40:29,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:40:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16354 states. [2021-04-15 02:40:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16354 to 9241. [2021-04-15 02:40:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9240 states have (on average 3.997943722943723) internal successors, (36941), 9240 states have internal predecessors, (36941), 0 states have call successors, (0), 0 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 02:40:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 36941 transitions. [2021-04-15 02:40:29,717 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 36941 transitions. Word has length 28 [2021-04-15 02:40:29,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:29,717 INFO L480 AbstractCegarLoop]: Abstraction has 9241 states and 36941 transitions. [2021-04-15 02:40:29,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 02:40:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 36941 transitions. [2021-04-15 02:40:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:29,732 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:29,732 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] [2021-04-15 02:40:29,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-04-15 02:40:29,937 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1291785701, now seen corresponding path program 23 times [2021-04-15 02:40:29,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:29,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149904167] [2021-04-15 02:40:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:29,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149904167] [2021-04-15 02:40:29,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710123561] [2021-04-15 02:40:29,969 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 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 02:40:29,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:40:29,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:29,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:29,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:30,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:30,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 02:40:30,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159503820] [2021-04-15 02:40:30,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:40:30,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:40:30,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:40:30,086 INFO L87 Difference]: Start difference. First operand 9241 states and 36941 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:30,585 INFO L93 Difference]: Finished difference Result 12762 states and 48779 transitions. [2021-04-15 02:40:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:40:30,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:30,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:30,615 INFO L225 Difference]: With dead ends: 12762 [2021-04-15 02:40:30,615 INFO L226 Difference]: Without dead ends: 12722 [2021-04-15 02:40:30,616 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:40:30,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12722 states. [2021-04-15 02:40:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12722 to 8983. [2021-04-15 02:40:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8983 states, 8982 states have (on average 4.0035626809173905) internal successors, (35960), 8982 states have internal predecessors, (35960), 0 states have call successors, (0), 0 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 02:40:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 35960 transitions. [2021-04-15 02:40:30,809 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 35960 transitions. Word has length 28 [2021-04-15 02:40:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:30,809 INFO L480 AbstractCegarLoop]: Abstraction has 8983 states and 35960 transitions. [2021-04-15 02:40:30,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 35960 transitions. [2021-04-15 02:40:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:30,824 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:30,824 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] [2021-04-15 02:40:31,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 02:40:31,025 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:31,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1628155237, now seen corresponding path program 4 times [2021-04-15 02:40:31,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:31,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002602362] [2021-04-15 02:40:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:31,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002602362] [2021-04-15 02:40:31,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216898924] [2021-04-15 02:40:31,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:40:31,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:40:31,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:31,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:31,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:31,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:31,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 02:40:31,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922652114] [2021-04-15 02:40:31,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:31,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:31,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:31,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:31,159 INFO L87 Difference]: Start difference. First operand 8983 states and 35960 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:32,069 INFO L93 Difference]: Finished difference Result 30234 states and 120265 transitions. [2021-04-15 02:40:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:40:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-04-15 02:40:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:32,154 INFO L225 Difference]: With dead ends: 30234 [2021-04-15 02:40:32,154 INFO L226 Difference]: Without dead ends: 30234 [2021-04-15 02:40:32,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 323.1ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:40:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30234 states. [2021-04-15 02:40:32,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30234 to 14412. [2021-04-15 02:40:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14412 states, 14411 states have (on average 4.099715495107904) internal successors, (59081), 14411 states have internal predecessors, (59081), 0 states have call successors, (0), 0 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 02:40:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 59081 transitions. [2021-04-15 02:40:32,526 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 59081 transitions. Word has length 28 [2021-04-15 02:40:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:32,526 INFO L480 AbstractCegarLoop]: Abstraction has 14412 states and 59081 transitions. [2021-04-15 02:40:32,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 59081 transitions. [2021-04-15 02:40:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:32,551 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:32,552 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] [2021-04-15 02:40:32,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 02:40:32,752 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:32,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:32,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1254864512, now seen corresponding path program 5 times [2021-04-15 02:40:32,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:32,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543138313] [2021-04-15 02:40:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:32,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543138313] [2021-04-15 02:40:32,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852958436] [2021-04-15 02:40:32,789 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 02:40:32,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:40:32,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:32,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:32,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:32,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:32,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 02:40:32,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024745578] [2021-04-15 02:40:32,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:32,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:32,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:32,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:32,909 INFO L87 Difference]: Start difference. First operand 14412 states and 59081 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:33,692 INFO L93 Difference]: Finished difference Result 40819 states and 161536 transitions. [2021-04-15 02:40:33,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:40:33,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-04-15 02:40:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:33,811 INFO L225 Difference]: With dead ends: 40819 [2021-04-15 02:40:33,811 INFO L226 Difference]: Without dead ends: 40578 [2021-04-15 02:40:33,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 291.6ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:40:33,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40578 states. [2021-04-15 02:40:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40578 to 24036. [2021-04-15 02:40:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.249511129602663) internal successors, (102137), 24035 states have internal predecessors, (102137), 0 states have call successors, (0), 0 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 02:40:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 102137 transitions. [2021-04-15 02:40:34,767 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 102137 transitions. Word has length 28 [2021-04-15 02:40:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:34,767 INFO L480 AbstractCegarLoop]: Abstraction has 24036 states and 102137 transitions. [2021-04-15 02:40:34,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:40:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 102137 transitions. [2021-04-15 02:40:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:34,816 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:34,816 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] [2021-04-15 02:40:35,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 02:40:35,017 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 165103934, now seen corresponding path program 6 times [2021-04-15 02:40:35,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:35,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824931500] [2021-04-15 02:40:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:35,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824931500] [2021-04-15 02:40:35,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089685955] [2021-04-15 02:40:35,257 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 02:40:35,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:40:35,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:35,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:35,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:35,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:35,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:40:35,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708691434] [2021-04-15 02:40:35,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:40:35,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:35,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:40:35,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:40:35,373 INFO L87 Difference]: Start difference. First operand 24036 states and 102137 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:36,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:36,082 INFO L93 Difference]: Finished difference Result 42953 states and 171667 transitions. [2021-04-15 02:40:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:40:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:36,237 INFO L225 Difference]: With dead ends: 42953 [2021-04-15 02:40:36,238 INFO L226 Difference]: Without dead ends: 42953 [2021-04-15 02:40:36,238 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:40:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42953 states. [2021-04-15 02:40:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42953 to 24036. [2021-04-15 02:40:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.228292074058665) internal successors, (101627), 24035 states have internal predecessors, (101627), 0 states have call successors, (0), 0 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 02:40:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 101627 transitions. [2021-04-15 02:40:37,232 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 101627 transitions. Word has length 28 [2021-04-15 02:40:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:37,232 INFO L480 AbstractCegarLoop]: Abstraction has 24036 states and 101627 transitions. [2021-04-15 02:40:37,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 101627 transitions. [2021-04-15 02:40:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:37,293 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:37,293 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] [2021-04-15 02:40:37,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 02:40:37,509 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:37,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:37,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1784850851, now seen corresponding path program 7 times [2021-04-15 02:40:37,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:37,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344116910] [2021-04-15 02:40:37,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:37,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344116910] [2021-04-15 02:40:37,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604288413] [2021-04-15 02:40:37,535 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 02:40:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:37,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:37,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:37,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:37,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:40:37,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471067422] [2021-04-15 02:40:37,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:40:37,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:37,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:40:37,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:40:37,650 INFO L87 Difference]: Start difference. First operand 24036 states and 101627 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:38,207 INFO L93 Difference]: Finished difference Result 29179 states and 119232 transitions. [2021-04-15 02:40:38,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:40:38,207 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:38,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:38,294 INFO L225 Difference]: With dead ends: 29179 [2021-04-15 02:40:38,294 INFO L226 Difference]: Without dead ends: 29131 [2021-04-15 02:40:38,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:40:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29131 states. [2021-04-15 02:40:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29131 to 24202. [2021-04-15 02:40:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24202 states, 24201 states have (on average 4.223296557993471) internal successors, (102208), 24201 states have internal predecessors, (102208), 0 states have call successors, (0), 0 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 02:40:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24202 states to 24202 states and 102208 transitions. [2021-04-15 02:40:39,021 INFO L78 Accepts]: Start accepts. Automaton has 24202 states and 102208 transitions. Word has length 28 [2021-04-15 02:40:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:39,022 INFO L480 AbstractCegarLoop]: Abstraction has 24202 states and 102208 transitions. [2021-04-15 02:40:39,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 24202 states and 102208 transitions. [2021-04-15 02:40:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:39,236 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:39,237 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] [2021-04-15 02:40:39,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:39,437 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:39,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1672080553, now seen corresponding path program 8 times [2021-04-15 02:40:39,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:39,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234933427] [2021-04-15 02:40:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:39,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234933427] [2021-04-15 02:40:39,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895459943] [2021-04-15 02:40:39,468 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 02:40:39,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:40:39,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:39,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:39,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:39,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-04-15 02:40:39,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9244100] [2021-04-15 02:40:39,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:39,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:39,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:39,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:39,585 INFO L87 Difference]: Start difference. First operand 24202 states and 102208 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 02:40:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:40,376 INFO L93 Difference]: Finished difference Result 49310 states and 196485 transitions. [2021-04-15 02:40:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:40:40,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 28 [2021-04-15 02:40:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:40,529 INFO L225 Difference]: With dead ends: 49310 [2021-04-15 02:40:40,529 INFO L226 Difference]: Without dead ends: 49310 [2021-04-15 02:40:40,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:40:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49310 states. [2021-04-15 02:40:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49310 to 24542. [2021-04-15 02:40:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.213683223992502) internal successors, (103408), 24541 states have internal predecessors, (103408), 0 states have call successors, (0), 0 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 02:40:41,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103408 transitions. [2021-04-15 02:40:41,540 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103408 transitions. Word has length 28 [2021-04-15 02:40:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:41,540 INFO L480 AbstractCegarLoop]: Abstraction has 24542 states and 103408 transitions. [2021-04-15 02:40:41,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 02:40:41,540 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103408 transitions. [2021-04-15 02:40:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:41,588 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:41,588 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] [2021-04-15 02:40:41,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 02:40:41,789 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:41,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1854451132, now seen corresponding path program 9 times [2021-04-15 02:40:41,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:41,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307491955] [2021-04-15 02:40:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:41,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307491955] [2021-04-15 02:40:41,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155118568] [2021-04-15 02:40:41,817 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 02:40:41,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:40:41,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:41,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:41,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:41,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:41,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-04-15 02:40:41,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360996149] [2021-04-15 02:40:41,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:41,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:41,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:41,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:41,946 INFO L87 Difference]: Start difference. First operand 24542 states and 103408 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:42,864 INFO L93 Difference]: Finished difference Result 43190 states and 171488 transitions. [2021-04-15 02:40:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:40:42,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:43,003 INFO L225 Difference]: With dead ends: 43190 [2021-04-15 02:40:43,003 INFO L226 Difference]: Without dead ends: 43115 [2021-04-15 02:40:43,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:40:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43115 states. [2021-04-15 02:40:43,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43115 to 24542. [2021-04-15 02:40:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.212705268733956) internal successors, (103384), 24541 states have internal predecessors, (103384), 0 states have call successors, (0), 0 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 02:40:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103384 transitions. [2021-04-15 02:40:43,959 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103384 transitions. Word has length 28 [2021-04-15 02:40:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:43,959 INFO L480 AbstractCegarLoop]: Abstraction has 24542 states and 103384 transitions. [2021-04-15 02:40:43,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103384 transitions. [2021-04-15 02:40:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:44,013 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:44,013 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] [2021-04-15 02:40:44,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-04-15 02:40:44,214 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:44,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:44,214 INFO L82 PathProgramCache]: Analyzing trace with hash 975011082, now seen corresponding path program 10 times [2021-04-15 02:40:44,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:44,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105962074] [2021-04-15 02:40:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:44,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105962074] [2021-04-15 02:40:44,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851210597] [2021-04-15 02:40:44,246 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 02:40:44,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:40:44,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:44,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:44,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:44,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:44,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-04-15 02:40:44,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095687294] [2021-04-15 02:40:44,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:44,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:44,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:44,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:44,380 INFO L87 Difference]: Start difference. First operand 24542 states and 103384 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:45,655 INFO L93 Difference]: Finished difference Result 51588 states and 205543 transitions. [2021-04-15 02:40:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:40:45,657 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:45,833 INFO L225 Difference]: With dead ends: 51588 [2021-04-15 02:40:45,833 INFO L226 Difference]: Without dead ends: 51588 [2021-04-15 02:40:45,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:40:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51588 states. [2021-04-15 02:40:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51588 to 24882. [2021-04-15 02:40:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.210200554640087) internal successors, (104754), 24881 states have internal predecessors, (104754), 0 states have call successors, (0), 0 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 02:40:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104754 transitions. [2021-04-15 02:40:46,821 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104754 transitions. Word has length 28 [2021-04-15 02:40:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:46,822 INFO L480 AbstractCegarLoop]: Abstraction has 24882 states and 104754 transitions. [2021-04-15 02:40:46,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104754 transitions. [2021-04-15 02:40:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:46,882 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:46,882 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] [2021-04-15 02:40:47,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:47,083 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash -974943703, now seen corresponding path program 11 times [2021-04-15 02:40:47,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:47,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634626822] [2021-04-15 02:40:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:47,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634626822] [2021-04-15 02:40:47,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29235107] [2021-04-15 02:40:47,115 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 02:40:47,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:40:47,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:47,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:47,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:47,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:47,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-04-15 02:40:47,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51922096] [2021-04-15 02:40:47,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:40:47,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:47,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:40:47,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:40:47,458 INFO L87 Difference]: Start difference. First operand 24882 states and 104754 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:48,090 INFO L93 Difference]: Finished difference Result 39744 states and 158044 transitions. [2021-04-15 02:40:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:40:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:48,196 INFO L225 Difference]: With dead ends: 39744 [2021-04-15 02:40:48,196 INFO L226 Difference]: Without dead ends: 39696 [2021-04-15 02:40:48,197 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:40:48,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39696 states. [2021-04-15 02:40:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39696 to 24882. [2021-04-15 02:40:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.209235963184759) internal successors, (104730), 24881 states have internal predecessors, (104730), 0 states have call successors, (0), 0 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 02:40:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104730 transitions. [2021-04-15 02:40:49,057 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104730 transitions. Word has length 28 [2021-04-15 02:40:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:49,058 INFO L480 AbstractCegarLoop]: Abstraction has 24882 states and 104730 transitions. [2021-04-15 02:40:49,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104730 transitions. [2021-04-15 02:40:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:49,108 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:49,108 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] [2021-04-15 02:40:49,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 02:40:49,309 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:49,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:49,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1393922136, now seen corresponding path program 12 times [2021-04-15 02:40:49,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:49,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818412322] [2021-04-15 02:40:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:49,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818412322] [2021-04-15 02:40:49,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502432843] [2021-04-15 02:40:49,362 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 02:40:49,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:40:49,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:49,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:49,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:49,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:49,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 02:40:49,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858740799] [2021-04-15 02:40:49,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:40:49,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:49,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:40:49,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:40:49,492 INFO L87 Difference]: Start difference. First operand 24882 states and 104730 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:50,676 INFO L93 Difference]: Finished difference Result 51567 states and 205376 transitions. [2021-04-15 02:40:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:40:50,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:50,842 INFO L225 Difference]: With dead ends: 51567 [2021-04-15 02:40:50,842 INFO L226 Difference]: Without dead ends: 51567 [2021-04-15 02:40:50,842 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:40:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51567 states. [2021-04-15 02:40:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51567 to 25308. [2021-04-15 02:40:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25308 states, 25307 states have (on average 4.182123523135891) internal successors, (105837), 25307 states have internal predecessors, (105837), 0 states have call successors, (0), 0 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 02:40:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25308 states to 25308 states and 105837 transitions. [2021-04-15 02:40:51,927 INFO L78 Accepts]: Start accepts. Automaton has 25308 states and 105837 transitions. Word has length 28 [2021-04-15 02:40:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:51,928 INFO L480 AbstractCegarLoop]: Abstraction has 25308 states and 105837 transitions. [2021-04-15 02:40:51,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:40:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 25308 states and 105837 transitions. [2021-04-15 02:40:51,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:51,993 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:51,994 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] [2021-04-15 02:40:52,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:52,194 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:52,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:52,195 INFO L82 PathProgramCache]: Analyzing trace with hash 770340333, now seen corresponding path program 13 times [2021-04-15 02:40:52,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:52,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505949904] [2021-04-15 02:40:52,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:52,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505949904] [2021-04-15 02:40:52,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936532460] [2021-04-15 02:40:52,228 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 02:40:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:52,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:52,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:52,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:52,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 02:40:52,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083280325] [2021-04-15 02:40:52,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:40:52,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:52,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:40:52,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:40:52,350 INFO L87 Difference]: Start difference. First operand 25308 states and 105837 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:53,268 INFO L93 Difference]: Finished difference Result 35545 states and 141251 transitions. [2021-04-15 02:40:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:40:53,269 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:53,379 INFO L225 Difference]: With dead ends: 35545 [2021-04-15 02:40:53,379 INFO L226 Difference]: Without dead ends: 35497 [2021-04-15 02:40:53,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:40:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35497 states. [2021-04-15 02:40:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35497 to 25624. [2021-04-15 02:40:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.173633064044023) internal successors, (106941), 25623 states have internal predecessors, (106941), 0 states have call successors, (0), 0 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 02:40:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106941 transitions. [2021-04-15 02:40:54,026 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106941 transitions. Word has length 28 [2021-04-15 02:40:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:54,026 INFO L480 AbstractCegarLoop]: Abstraction has 25624 states and 106941 transitions. [2021-04-15 02:40:54,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106941 transitions. [2021-04-15 02:40:54,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:54,312 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:54,312 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] [2021-04-15 02:40:54,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-04-15 02:40:54,527 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:54,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash 778555929, now seen corresponding path program 14 times [2021-04-15 02:40:54,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:54,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929594688] [2021-04-15 02:40:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:54,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929594688] [2021-04-15 02:40:54,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905588791] [2021-04-15 02:40:54,556 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 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 02:40:54,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:40:54,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:54,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:54,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:54,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:54,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:40:54,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411615411] [2021-04-15 02:40:54,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:40:54,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:54,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:40:54,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:40:54,662 INFO L87 Difference]: Start difference. First operand 25624 states and 106941 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 02:40:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:55,274 INFO L93 Difference]: Finished difference Result 46151 states and 182270 transitions. [2021-04-15 02:40:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:40:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 28 [2021-04-15 02:40:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:55,417 INFO L225 Difference]: With dead ends: 46151 [2021-04-15 02:40:55,418 INFO L226 Difference]: Without dead ends: 46151 [2021-04-15 02:40:55,418 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:40:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46151 states. [2021-04-15 02:40:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46151 to 25624. [2021-04-15 02:40:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166998399875112) internal successors, (106771), 25623 states have internal predecessors, (106771), 0 states have call successors, (0), 0 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 02:40:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106771 transitions. [2021-04-15 02:40:56,401 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106771 transitions. Word has length 28 [2021-04-15 02:40:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:56,401 INFO L480 AbstractCegarLoop]: Abstraction has 25624 states and 106771 transitions. [2021-04-15 02:40:56,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 02:40:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106771 transitions. [2021-04-15 02:40:56,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:56,459 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:56,459 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] [2021-04-15 02:40:56,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 02:40:56,660 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:56,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1546991540, now seen corresponding path program 15 times [2021-04-15 02:40:56,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:56,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247804367] [2021-04-15 02:40:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:56,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247804367] [2021-04-15 02:40:56,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170420312] [2021-04-15 02:40:56,687 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 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 02:40:56,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:40:56,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:56,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:56,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:56,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:56,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:40:56,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185305308] [2021-04-15 02:40:56,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:40:56,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:56,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:40:56,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:40:56,810 INFO L87 Difference]: Start difference. First operand 25624 states and 106771 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:57,227 INFO L93 Difference]: Finished difference Result 32707 states and 131617 transitions. [2021-04-15 02:40:57,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:40:57,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:57,317 INFO L225 Difference]: With dead ends: 32707 [2021-04-15 02:40:57,317 INFO L226 Difference]: Without dead ends: 32682 [2021-04-15 02:40:57,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:40:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32682 states. [2021-04-15 02:40:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32682 to 25624. [2021-04-15 02:40:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166530070639659) internal successors, (106759), 25623 states have internal predecessors, (106759), 0 states have call successors, (0), 0 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 02:40:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106759 transitions. [2021-04-15 02:40:58,164 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106759 transitions. Word has length 28 [2021-04-15 02:40:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:58,164 INFO L480 AbstractCegarLoop]: Abstraction has 25624 states and 106759 transitions. [2021-04-15 02:40:58,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:40:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106759 transitions. [2021-04-15 02:40:58,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:40:58,220 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:58,220 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] [2021-04-15 02:40:58,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-04-15 02:40:58,421 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:58,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:58,421 INFO L82 PathProgramCache]: Analyzing trace with hash 81486458, now seen corresponding path program 16 times [2021-04-15 02:40:58,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:58,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187901249] [2021-04-15 02:40:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:58,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187901249] [2021-04-15 02:40:58,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575959474] [2021-04-15 02:40:58,447 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 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 02:40:58,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:40:58,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:58,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:40:58,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:58,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:58,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:40:58,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562948464] [2021-04-15 02:40:58,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:40:58,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:58,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:40:58,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:40:58,561 INFO L87 Difference]: Start difference. First operand 25624 states and 106759 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:59,528 INFO L93 Difference]: Finished difference Result 38112 states and 153561 transitions. [2021-04-15 02:40:59,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:40:59,528 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:40:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:59,647 INFO L225 Difference]: With dead ends: 38112 [2021-04-15 02:40:59,647 INFO L226 Difference]: Without dead ends: 38112 [2021-04-15 02:40:59,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:40:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38112 states. [2021-04-15 02:41:00,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38112 to 25794. [2021-04-15 02:41:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.1656263327259335) internal successors, (107444), 25793 states have internal predecessors, (107444), 0 states have call successors, (0), 0 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 02:41:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107444 transitions. [2021-04-15 02:41:00,303 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107444 transitions. Word has length 28 [2021-04-15 02:41:00,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:00,303 INFO L480 AbstractCegarLoop]: Abstraction has 25794 states and 107444 transitions. [2021-04-15 02:41:00,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:00,303 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107444 transitions. [2021-04-15 02:41:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:41:00,360 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:00,360 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] [2021-04-15 02:41:00,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-04-15 02:41:00,562 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:00,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:00,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1868468327, now seen corresponding path program 17 times [2021-04-15 02:41:00,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:00,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326839200] [2021-04-15 02:41:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:41:00,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326839200] [2021-04-15 02:41:00,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967374827] [2021-04-15 02:41:00,587 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 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 02:41:00,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:41:00,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:00,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:41:00,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:00,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:00,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-04-15 02:41:00,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834994119] [2021-04-15 02:41:00,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:41:00,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:00,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:41:00,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:41:00,999 INFO L87 Difference]: Start difference. First operand 25794 states and 107444 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:41:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:01,573 INFO L93 Difference]: Finished difference Result 39804 states and 156168 transitions. [2021-04-15 02:41:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:41:01,573 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:41:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:01,687 INFO L225 Difference]: With dead ends: 39804 [2021-04-15 02:41:01,687 INFO L226 Difference]: Without dead ends: 39780 [2021-04-15 02:41:01,688 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:41:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39780 states. [2021-04-15 02:41:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39780 to 25794. [2021-04-15 02:41:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.165161090218276) internal successors, (107432), 25793 states have internal predecessors, (107432), 0 states have call successors, (0), 0 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 02:41:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107432 transitions. [2021-04-15 02:41:02,657 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107432 transitions. Word has length 28 [2021-04-15 02:41:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:02,657 INFO L480 AbstractCegarLoop]: Abstraction has 25794 states and 107432 transitions. [2021-04-15 02:41:02,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:41:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107432 transitions. [2021-04-15 02:41:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:41:02,711 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:02,711 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] [2021-04-15 02:41:02,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:02,912 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2007520536, now seen corresponding path program 18 times [2021-04-15 02:41:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:02,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791462614] [2021-04-15 02:41:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:02,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791462614] [2021-04-15 02:41:02,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857114475] [2021-04-15 02:41:02,941 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 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 02:41:02,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:41:02,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:02,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:41:02,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:03,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:03,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-04-15 02:41:03,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254581699] [2021-04-15 02:41:03,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:41:03,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:03,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:41:03,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:41:03,049 INFO L87 Difference]: Start difference. First operand 25794 states and 107432 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:03,970 INFO L93 Difference]: Finished difference Result 48289 states and 195910 transitions. [2021-04-15 02:41:03,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:41:03,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:41:03,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:04,108 INFO L225 Difference]: With dead ends: 48289 [2021-04-15 02:41:04,108 INFO L226 Difference]: Without dead ends: 48289 [2021-04-15 02:41:04,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:41:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48289 states. [2021-04-15 02:41:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48289 to 25964. [2021-04-15 02:41:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.164272233563148) internal successors, (108117), 25963 states have internal predecessors, (108117), 0 states have call successors, (0), 0 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 02:41:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108117 transitions. [2021-04-15 02:41:05,156 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108117 transitions. Word has length 28 [2021-04-15 02:41:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:05,156 INFO L480 AbstractCegarLoop]: Abstraction has 25964 states and 108117 transitions. [2021-04-15 02:41:05,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108117 transitions. [2021-04-15 02:41:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:41:05,209 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:05,209 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] [2021-04-15 02:41:05,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 02:41:05,410 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:05,410 INFO L82 PathProgramCache]: Analyzing trace with hash -123184291, now seen corresponding path program 19 times [2021-04-15 02:41:05,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:05,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363827233] [2021-04-15 02:41:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:05,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363827233] [2021-04-15 02:41:05,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960637937] [2021-04-15 02:41:05,441 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 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 02:41:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:05,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:41:05,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:05,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:05,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-04-15 02:41:05,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891705252] [2021-04-15 02:41:05,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:41:05,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:05,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:41:05,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:41:05,538 INFO L87 Difference]: Start difference. First operand 25964 states and 108117 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:41:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:06,509 INFO L93 Difference]: Finished difference Result 47194 states and 183148 transitions. [2021-04-15 02:41:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:41:06,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:41:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:06,641 INFO L225 Difference]: With dead ends: 47194 [2021-04-15 02:41:06,641 INFO L226 Difference]: Without dead ends: 47098 [2021-04-15 02:41:06,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:41:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47098 states. [2021-04-15 02:41:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47098 to 25964. [2021-04-15 02:41:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.16381003736086) internal successors, (108105), 25963 states have internal predecessors, (108105), 0 states have call successors, (0), 0 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 02:41:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108105 transitions. [2021-04-15 02:41:07,698 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108105 transitions. Word has length 28 [2021-04-15 02:41:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:07,699 INFO L480 AbstractCegarLoop]: Abstraction has 25964 states and 108105 transitions. [2021-04-15 02:41:07,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 02:41:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108105 transitions. [2021-04-15 02:41:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:41:07,760 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:07,760 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] [2021-04-15 02:41:07,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:07,961 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:07,961 INFO L82 PathProgramCache]: Analyzing trace with hash 740063358, now seen corresponding path program 20 times [2021-04-15 02:41:07,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:07,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054207927] [2021-04-15 02:41:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:08,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054207927] [2021-04-15 02:41:08,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624372642] [2021-04-15 02:41:08,004 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:08,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:41:08,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:41:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:08,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:08,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 02:41:08,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858812371] [2021-04-15 02:41:08,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:41:08,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:08,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:41:08,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:41:08,118 INFO L87 Difference]: Start difference. First operand 25964 states and 108105 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:41:09,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:09,157 INFO L93 Difference]: Finished difference Result 38914 states and 158503 transitions. [2021-04-15 02:41:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:41:09,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-04-15 02:41:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:09,281 INFO L225 Difference]: With dead ends: 38914 [2021-04-15 02:41:09,281 INFO L226 Difference]: Without dead ends: 38914 [2021-04-15 02:41:09,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 366.5ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:41:09,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38914 states. [2021-04-15 02:41:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38914 to 26620. [2021-04-15 02:41:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26620 states, 26619 states have (on average 4.1402381757391336) internal successors, (110209), 26619 states have internal predecessors, (110209), 0 states have call successors, (0), 0 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 02:41:10,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26620 states to 26620 states and 110209 transitions. [2021-04-15 02:41:10,242 INFO L78 Accepts]: Start accepts. Automaton has 26620 states and 110209 transitions. Word has length 28 [2021-04-15 02:41:10,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:10,242 INFO L480 AbstractCegarLoop]: Abstraction has 26620 states and 110209 transitions. [2021-04-15 02:41:10,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:41:10,242 INFO L276 IsEmpty]: Start isEmpty. Operand 26620 states and 110209 transitions. [2021-04-15 02:41:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:41:10,296 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:10,296 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] [2021-04-15 02:41:10,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:10,497 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:10,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1153142681, now seen corresponding path program 21 times [2021-04-15 02:41:10,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:10,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580802518] [2021-04-15 02:41:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:10,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580802518] [2021-04-15 02:41:10,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736243767] [2021-04-15 02:41:10,532 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:10,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:41:10,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:10,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:41:10,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:10,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:10,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 02:41:10,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513282087] [2021-04-15 02:41:10,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:41:10,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:10,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:41:10,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:41:10,624 INFO L87 Difference]: Start difference. First operand 26620 states and 110209 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:41:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:11,687 INFO L93 Difference]: Finished difference Result 41610 states and 161108 transitions. [2021-04-15 02:41:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:41:11,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 28 [2021-04-15 02:41:11,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:11,834 INFO L225 Difference]: With dead ends: 41610 [2021-04-15 02:41:11,835 INFO L226 Difference]: Without dead ends: 41514 [2021-04-15 02:41:11,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:41:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41514 states. [2021-04-15 02:41:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41514 to 27244. [2021-04-15 02:41:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27244 states, 27243 states have (on average 4.125646955181147) internal successors, (112395), 27243 states have internal predecessors, (112395), 0 states have call successors, (0), 0 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 02:41:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27244 states to 27244 states and 112395 transitions. [2021-04-15 02:41:12,555 INFO L78 Accepts]: Start accepts. Automaton has 27244 states and 112395 transitions. Word has length 28 [2021-04-15 02:41:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:12,555 INFO L480 AbstractCegarLoop]: Abstraction has 27244 states and 112395 transitions. [2021-04-15 02:41:12,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 02:41:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 27244 states and 112395 transitions. [2021-04-15 02:41:12,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:41:12,611 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:12,611 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] [2021-04-15 02:41:12,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-04-15 02:41:12,812 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:12,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:12,812 INFO L82 PathProgramCache]: Analyzing trace with hash -73330929, now seen corresponding path program 22 times [2021-04-15 02:41:12,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:12,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757677978] [2021-04-15 02:41:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:12,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757677978] [2021-04-15 02:41:12,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303110292] [2021-04-15 02:41:12,841 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:12,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:41:12,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:12,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:41:12,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:13,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:13,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 02:41:13,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961124623] [2021-04-15 02:41:13,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:41:13,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:13,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:41:13,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:41:13,259 INFO L87 Difference]: Start difference. First operand 27244 states and 112395 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 02:41:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:14,141 INFO L93 Difference]: Finished difference Result 48209 states and 191672 transitions. [2021-04-15 02:41:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:41:14,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 28 [2021-04-15 02:41:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:14,274 INFO L225 Difference]: With dead ends: 48209 [2021-04-15 02:41:14,274 INFO L226 Difference]: Without dead ends: 48209 [2021-04-15 02:41:14,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:41:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48209 states. [2021-04-15 02:41:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48209 to 26904. [2021-04-15 02:41:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26904 states, 26903 states have (on average 4.114225179348028) internal successors, (110685), 26903 states have internal predecessors, (110685), 0 states have call successors, (0), 0 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 02:41:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 110685 transitions. [2021-04-15 02:41:15,334 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 110685 transitions. Word has length 28 [2021-04-15 02:41:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:15,334 INFO L480 AbstractCegarLoop]: Abstraction has 26904 states and 110685 transitions. [2021-04-15 02:41:15,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 02:41:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 110685 transitions. [2021-04-15 02:41:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 02:41:15,399 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:15,399 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] [2021-04-15 02:41:15,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:15,599 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:15,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1673828536, now seen corresponding path program 23 times [2021-04-15 02:41:15,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:15,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464088721] [2021-04-15 02:41:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:15,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464088721] [2021-04-15 02:41:15,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88632923] [2021-04-15 02:41:15,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:15,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:41:15,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:15,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:41:15,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:15,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:15,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 02:41:15,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203462899] [2021-04-15 02:41:15,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:41:15,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:15,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:41:15,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:41:15,768 INFO L87 Difference]: Start difference. First operand 26904 states and 110685 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:16,511 INFO L93 Difference]: Finished difference Result 35478 states and 139558 transitions. [2021-04-15 02:41:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:41:16,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 02:41:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:16,614 INFO L225 Difference]: With dead ends: 35478 [2021-04-15 02:41:16,615 INFO L226 Difference]: Without dead ends: 35428 [2021-04-15 02:41:16,615 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:41:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35428 states. [2021-04-15 02:41:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35428 to 26239. [2021-04-15 02:41:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26239 states, 26238 states have (on average 4.115595700891836) internal successors, (107985), 26238 states have internal predecessors, (107985), 0 states have call successors, (0), 0 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 02:41:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26239 states to 26239 states and 107985 transitions. [2021-04-15 02:41:17,511 INFO L78 Accepts]: Start accepts. Automaton has 26239 states and 107985 transitions. Word has length 28 [2021-04-15 02:41:17,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:17,512 INFO L480 AbstractCegarLoop]: Abstraction has 26239 states and 107985 transitions. [2021-04-15 02:41:17,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:17,512 INFO L276 IsEmpty]: Start isEmpty. Operand 26239 states and 107985 transitions. [2021-04-15 02:41:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 02:41:17,564 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:17,564 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:17,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-04-15 02:41:17,765 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:17,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:17,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1595574120, now seen corresponding path program 24 times [2021-04-15 02:41:17,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:17,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428486049] [2021-04-15 02:41:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:17,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428486049] [2021-04-15 02:41:17,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19942566] [2021-04-15 02:41:17,842 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:17,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:41:17,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:17,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 02:41:17,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:18,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:18,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-04-15 02:41:18,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26548047] [2021-04-15 02:41:18,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:41:18,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:18,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:41:18,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:41:18,218 INFO L87 Difference]: Start difference. First operand 26239 states and 107985 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:19,304 INFO L93 Difference]: Finished difference Result 29258 states and 119012 transitions. [2021-04-15 02:41:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:41:19,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 02:41:19,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:19,393 INFO L225 Difference]: With dead ends: 29258 [2021-04-15 02:41:19,393 INFO L226 Difference]: Without dead ends: 29122 [2021-04-15 02:41:19,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:41:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-04-15 02:41:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 26985. [2021-04-15 02:41:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26985 states, 26984 states have (on average 4.111139934776164) internal successors, (110935), 26984 states have internal predecessors, (110935), 0 states have call successors, (0), 0 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 02:41:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26985 states to 26985 states and 110935 transitions. [2021-04-15 02:41:19,987 INFO L78 Accepts]: Start accepts. Automaton has 26985 states and 110935 transitions. Word has length 31 [2021-04-15 02:41:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:19,987 INFO L480 AbstractCegarLoop]: Abstraction has 26985 states and 110935 transitions. [2021-04-15 02:41:19,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 26985 states and 110935 transitions. [2021-04-15 02:41:20,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 02:41:20,048 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:20,049 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:20,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:20,250 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:20,251 INFO L82 PathProgramCache]: Analyzing trace with hash -457978980, now seen corresponding path program 25 times [2021-04-15 02:41:20,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:20,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463199910] [2021-04-15 02:41:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:41:20,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463199910] [2021-04-15 02:41:20,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598615176] [2021-04-15 02:41:20,312 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:20,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 02:41:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:20,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:20,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-04-15 02:41:20,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769191683] [2021-04-15 02:41:20,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:41:20,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:20,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:41:20,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:41:20,896 INFO L87 Difference]: Start difference. First operand 26985 states and 110935 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 02:41:21,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:21,804 INFO L93 Difference]: Finished difference Result 30378 states and 123415 transitions. [2021-04-15 02:41:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:41:21,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 02:41:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:21,904 INFO L225 Difference]: With dead ends: 30378 [2021-04-15 02:41:21,904 INFO L226 Difference]: Without dead ends: 30174 [2021-04-15 02:41:21,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:41:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30174 states. [2021-04-15 02:41:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30174 to 27681. [2021-04-15 02:41:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27681 states, 27680 states have (on average 4.11296965317919) internal successors, (113847), 27680 states have internal predecessors, (113847), 0 states have call successors, (0), 0 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 02:41:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27681 states to 27681 states and 113847 transitions. [2021-04-15 02:41:22,772 INFO L78 Accepts]: Start accepts. Automaton has 27681 states and 113847 transitions. Word has length 31 [2021-04-15 02:41:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:22,772 INFO L480 AbstractCegarLoop]: Abstraction has 27681 states and 113847 transitions. [2021-04-15 02:41:22,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 02:41:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 27681 states and 113847 transitions. [2021-04-15 02:41:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 02:41:22,829 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:22,830 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:23,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-04-15 02:41:23,030 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:23,031 INFO L82 PathProgramCache]: Analyzing trace with hash 383912552, now seen corresponding path program 26 times [2021-04-15 02:41:23,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:23,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622270313] [2021-04-15 02:41:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:41:23,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622270313] [2021-04-15 02:41:23,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863307145] [2021-04-15 02:41:23,105 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:23,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:41:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 02:41:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:23,440 WARN L340 FreeRefinementEngine]: Global settings require throwing the following exception [2021-04-15 02:41:23,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-15 02:41:23,661 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:408) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:862) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:828) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:746) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:383) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:315) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:640) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-04-15 02:41:23,665 INFO L168 Benchmark]: Toolchain (without parser) took 87378.14 ms. Allocated memory was 255.9 MB in the beginning and 14.4 GB in the end (delta: 14.2 GB). Free memory was 236.5 MB in the beginning and 10.9 GB in the end (delta: -10.6 GB). Peak memory consumption was 3.6 GB. Max. memory is 16.0 GB. [2021-04-15 02:41:23,666 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 162.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:41:23,666 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.13 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 235.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:41:23,666 INFO L168 Benchmark]: Boogie Preprocessor took 20.15 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 988.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:41:23,666 INFO L168 Benchmark]: RCFGBuilder took 304.89 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 238.8 MB in the end (delta: -5.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-04-15 02:41:23,666 INFO L168 Benchmark]: TraceAbstraction took 87021.42 ms. Allocated memory was 255.9 MB in the beginning and 14.4 GB in the end (delta: 14.2 GB). Free memory was 238.1 MB in the beginning and 10.9 GB in the end (delta: -10.6 GB). Peak memory consumption was 3.6 GB. Max. memory is 16.0 GB. [2021-04-15 02:41:23,667 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 162.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.13 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 235.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.15 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 988.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 304.89 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 238.8 MB in the end (delta: -5.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 87021.42 ms. Allocated memory was 255.9 MB in the beginning and 14.4 GB in the end (delta: 14.2 GB). Free memory was 238.1 MB in the beginning and 10.9 GB in the end (delta: -10.6 GB). Peak memory consumption was 3.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...