/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:41:51,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:41:51,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:41:51,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:41:52,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:41:52,030 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:41:52,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:41:52,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:41:52,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:41:52,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:41:52,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:41:52,032 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:41:52,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:41:52,033 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:41:52,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:41:52,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:41:52,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:41:52,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:41:52,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:41:52,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:41:52,034 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:41:52,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:41:52,035 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:41:52,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:41:52,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:41:52,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:41:52,036 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:41:52,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:41:52,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:41:52,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:41:52,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:41:52,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:41:52,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:41:52,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:41:52,045 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:41:52,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:41:52,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:41:52,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:41:52,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:41:52,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:41:52,302 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:41:52,305 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:41:52,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2021-07-13 20:41:52,305 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2021-07-13 20:41:52,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:41:52,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:41:52,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:41:52,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:41:52,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:41:52,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:52" (1/1) ... [2021-07-13 20:41:52,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:52" (1/1) ... [2021-07-13 20:41:52,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:41:52,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:41:52,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:41:52,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:41:52,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:52" (1/1) ... [2021-07-13 20:41:52,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:52" (1/1) ... [2021-07-13 20:41:52,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:52" (1/1) ... [2021-07-13 20:41:52,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:52" (1/1) ... [2021-07-13 20:41:52,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:52" (1/1) ... [2021-07-13 20:41:52,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:52" (1/1) ... [2021-07-13 20:41:52,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:52" (1/1) ... [2021-07-13 20:41:52,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:41:52,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:41:52,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:41:52,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:41:52,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:41:52,447 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:41:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:41:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:41:52,448 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:41:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:41:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:41:52,448 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:41:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:41:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:41:52,449 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:41:52,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:41:52,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:41:52,450 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:41:52,610 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:41:52,628 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:41:52,643 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:41:52 BoogieIcfgContainer [2021-07-13 20:41:52,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:41:52,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:41:52,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:41:52,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:41:52,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:52" (1/2) ... [2021-07-13 20:41:52,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24fd8716 and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:41:52, skipping insertion in model container [2021-07-13 20:41:52,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:41:52" (2/2) ... [2021-07-13 20:41:52,649 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2021-07-13 20:41:52,652 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:41:52,652 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:41:52,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:41:52,653 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:41:52,675 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:41:52,698 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:41:52,726 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:41:52,726 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:41:52,726 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:41:52,727 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:41:52,727 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:41:52,727 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:41:52,727 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:41:52,727 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:41:52,733 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2021-07-13 20:41:52,763 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:52,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:41:52,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:52,772 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:52,772 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:52,777 INFO L82 PathProgramCache]: Analyzing trace with hash -482426042, now seen corresponding path program 1 times [2021-07-13 20:41:52,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:52,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605994174] [2021-07-13 20:41:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:52,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:52,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605994174] [2021-07-13 20:41:52,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605994174] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:52,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:52,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:41:52,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65363625] [2021-07-13 20:41:52,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:41:52,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:41:52,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:41:52,898 INFO L87 Difference]: Start difference. First operand has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:52,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:52,939 INFO L93 Difference]: Finished difference Result 135 states and 376 transitions. [2021-07-13 20:41:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:41:52,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:41:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:52,948 INFO L225 Difference]: With dead ends: 135 [2021-07-13 20:41:52,948 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 20:41:52,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:41:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 20:41:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-07-13 20:41:52,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2021-07-13 20:41:52,985 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2021-07-13 20:41:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:52,986 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2021-07-13 20:41:52,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2021-07-13 20:41:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:41:52,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:52,988 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:52,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:41:52,988 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:52,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1659723100, now seen corresponding path program 1 times [2021-07-13 20:41:52,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:52,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758948481] [2021-07-13 20:41:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:53,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:53,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758948481] [2021-07-13 20:41:53,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758948481] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:53,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:53,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:41:53,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709932293] [2021-07-13 20:41:53,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:41:53,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:53,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:41:53,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:41:53,041 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2021-07-13 20:41:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:53,090 INFO L93 Difference]: Finished difference Result 185 states and 524 transitions. [2021-07-13 20:41:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:41:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 [2021-07-13 20:41:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:53,092 INFO L225 Difference]: With dead ends: 185 [2021-07-13 20:41:53,092 INFO L226 Difference]: Without dead ends: 185 [2021-07-13 20:41:53,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:41:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-07-13 20:41:53,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 160. [2021-07-13 20:41:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2021-07-13 20:41:53,104 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2021-07-13 20:41:53,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:53,104 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2021-07-13 20:41:53,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2021-07-13 20:41:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2021-07-13 20:41:53,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:41:53,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:53,106 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:53,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:41:53,106 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:53,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:53,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1666279556, now seen corresponding path program 1 times [2021-07-13 20:41:53,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:53,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991061752] [2021-07-13 20:41:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:53,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:53,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991061752] [2021-07-13 20:41:53,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991061752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:53,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850770617] [2021-07-13 20:41:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:53,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:41:53,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:53,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:41:53,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:53,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:53,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:41:53,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:20 [2021-07-13 20:41:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:53,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850770617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:53,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:53,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-13 20:41:53,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914232279] [2021-07-13 20:41:53,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:53,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:53,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:53,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:53,738 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:54,147 INFO L93 Difference]: Finished difference Result 395 states and 1116 transitions. [2021-07-13 20:41:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:41:54,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 24 [2021-07-13 20:41:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:54,150 INFO L225 Difference]: With dead ends: 395 [2021-07-13 20:41:54,150 INFO L226 Difference]: Without dead ends: 280 [2021-07-13 20:41:54,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 464.1ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:41:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-13 20:41:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2021-07-13 20:41:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2021-07-13 20:41:54,167 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2021-07-13 20:41:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:54,167 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2021-07-13 20:41:54,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2021-07-13 20:41:54,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:41:54,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:54,168 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:54,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 20:41:54,385 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:54,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:54,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1670859648, now seen corresponding path program 2 times [2021-07-13 20:41:54,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:54,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869461088] [2021-07-13 20:41:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:54,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:54,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869461088] [2021-07-13 20:41:54,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869461088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130969452] [2021-07-13 20:41:54,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:54,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:54,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:54,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:41:54,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:54,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:41:54,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:54,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:54,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:41:54,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2021-07-13 20:41:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:54,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130969452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:54,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:41:54,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974536528] [2021-07-13 20:41:54,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:54,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:54,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:54,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:54,858 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:55,822 INFO L93 Difference]: Finished difference Result 639 states and 1800 transitions. [2021-07-13 20:41:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:41:55,823 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:41:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:55,825 INFO L225 Difference]: With dead ends: 639 [2021-07-13 20:41:55,825 INFO L226 Difference]: Without dead ends: 546 [2021-07-13 20:41:55,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 885.2ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:41:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-13 20:41:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 281. [2021-07-13 20:41:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.8892857142857142) internal successors, (809), 280 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 809 transitions. [2021-07-13 20:41:55,838 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 809 transitions. Word has length 24 [2021-07-13 20:41:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:55,838 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 809 transitions. [2021-07-13 20:41:55,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 809 transitions. [2021-07-13 20:41:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:55,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:55,840 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:56,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:56,049 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:56,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1190941142, now seen corresponding path program 3 times [2021-07-13 20:41:56,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:56,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989649768] [2021-07-13 20:41:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:56,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:56,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989649768] [2021-07-13 20:41:56,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989649768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:56,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538473646] [2021-07-13 20:41:56,098 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:56,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:41:56,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:56,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:41:56,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:56,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:41:56,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:56,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:56,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:41:56,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-13 20:41:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:41:56,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538473646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:56,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:56,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:41:56,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36876019] [2021-07-13 20:41:56,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:56,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:56,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:56,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:56,329 INFO L87 Difference]: Start difference. First operand 281 states and 809 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:57,700 INFO L93 Difference]: Finished difference Result 1001 states and 2814 transitions. [2021-07-13 20:41:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:41:57,700 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:57,706 INFO L225 Difference]: With dead ends: 1001 [2021-07-13 20:41:57,709 INFO L226 Difference]: Without dead ends: 966 [2021-07-13 20:41:57,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 790.1ms TimeCoverageRelationStatistics Valid=549, Invalid=2757, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:41:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-07-13 20:41:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 305. [2021-07-13 20:41:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.924342105263158) internal successors, (889), 304 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 889 transitions. [2021-07-13 20:41:57,722 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 889 transitions. Word has length 26 [2021-07-13 20:41:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:57,722 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 889 transitions. [2021-07-13 20:41:57,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 889 transitions. [2021-07-13 20:41:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:57,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:57,724 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:57,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:57,937 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1175480346, now seen corresponding path program 4 times [2021-07-13 20:41:57,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:57,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282155182] [2021-07-13 20:41:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:57,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:57,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282155182] [2021-07-13 20:41:57,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282155182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:57,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340971747] [2021-07-13 20:41:57,990 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:58,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:58,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:58,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:41:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:58,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340971747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:58,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:58,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:41:58,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570358240] [2021-07-13 20:41:58,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:58,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:58,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:58,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:58,100 INFO L87 Difference]: Start difference. First operand 305 states and 889 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:58,819 INFO L93 Difference]: Finished difference Result 1201 states and 3376 transitions. [2021-07-13 20:41:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:41:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 26 [2021-07-13 20:41:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:58,824 INFO L225 Difference]: With dead ends: 1201 [2021-07-13 20:41:58,824 INFO L226 Difference]: Without dead ends: 1201 [2021-07-13 20:41:58,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:41:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-07-13 20:41:58,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 365. [2021-07-13 20:41:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0961538461538463) internal successors, (1127), 364 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1127 transitions. [2021-07-13 20:41:58,837 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1127 transitions. Word has length 26 [2021-07-13 20:41:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:58,837 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1127 transitions. [2021-07-13 20:41:58,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1127 transitions. [2021-07-13 20:41:58,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:58,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:58,838 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:59,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:59,052 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:59,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:59,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1693913438, now seen corresponding path program 5 times [2021-07-13 20:41:59,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:59,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327606894] [2021-07-13 20:41:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:59,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327606894] [2021-07-13 20:41:59,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327606894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460660625] [2021-07-13 20:41:59,110 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:59,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:59,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:59,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:41:59,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460660625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:59,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:41:59,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046515009] [2021-07-13 20:41:59,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:59,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:59,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:59,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:59,253 INFO L87 Difference]: Start difference. First operand 365 states and 1127 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:00,011 INFO L93 Difference]: Finished difference Result 1858 states and 5235 transitions. [2021-07-13 20:42:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:42:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 26 [2021-07-13 20:42:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:00,019 INFO L225 Difference]: With dead ends: 1858 [2021-07-13 20:42:00,019 INFO L226 Difference]: Without dead ends: 1858 [2021-07-13 20:42:00,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:42:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-07-13 20:42:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 388. [2021-07-13 20:42:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1834625322997416) internal successors, (1232), 387 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1232 transitions. [2021-07-13 20:42:00,037 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1232 transitions. Word has length 26 [2021-07-13 20:42:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:00,037 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1232 transitions. [2021-07-13 20:42:00,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1232 transitions. [2021-07-13 20:42:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:00,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:00,038 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:00,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 20:42:00,257 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:00,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:00,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1481056820, now seen corresponding path program 6 times [2021-07-13 20:42:00,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:00,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822022983] [2021-07-13 20:42:00,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:00,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:00,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822022983] [2021-07-13 20:42:00,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822022983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:00,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611092191] [2021-07-13 20:42:00,294 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:00,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:00,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:00,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:42:00,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:00,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611092191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:00,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:00,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:42:00,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787158863] [2021-07-13 20:42:00,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:00,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:00,411 INFO L87 Difference]: Start difference. First operand 388 states and 1232 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:01,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:01,006 INFO L93 Difference]: Finished difference Result 1674 states and 4689 transitions. [2021-07-13 20:42:01,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:42:01,006 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:01,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:01,012 INFO L225 Difference]: With dead ends: 1674 [2021-07-13 20:42:01,012 INFO L226 Difference]: Without dead ends: 1670 [2021-07-13 20:42:01,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:42:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-07-13 20:42:01,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 402. [2021-07-13 20:42:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1645885286783044) internal successors, (1269), 401 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1269 transitions. [2021-07-13 20:42:01,028 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1269 transitions. Word has length 26 [2021-07-13 20:42:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:01,028 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1269 transitions. [2021-07-13 20:42:01,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1269 transitions. [2021-07-13 20:42:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:01,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:01,030 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:01,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:01,245 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:01,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:01,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1751566512, now seen corresponding path program 7 times [2021-07-13 20:42:01,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:01,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128346521] [2021-07-13 20:42:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:01,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:01,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128346521] [2021-07-13 20:42:01,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128346521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:01,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383490156] [2021-07-13 20:42:01,305 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:01,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:42:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:01,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383490156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:01,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:01,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:42:01,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474396443] [2021-07-13 20:42:01,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:01,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:01,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:01,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:01,418 INFO L87 Difference]: Start difference. First operand 402 states and 1269 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:02,053 INFO L93 Difference]: Finished difference Result 1844 states and 5052 transitions. [2021-07-13 20:42:02,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:42:02,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:02,060 INFO L225 Difference]: With dead ends: 1844 [2021-07-13 20:42:02,060 INFO L226 Difference]: Without dead ends: 1844 [2021-07-13 20:42:02,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 361.3ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:42:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-07-13 20:42:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 400. [2021-07-13 20:42:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1679197994987467) internal successors, (1264), 399 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:02,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1264 transitions. [2021-07-13 20:42:02,076 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1264 transitions. Word has length 26 [2021-07-13 20:42:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:02,076 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1264 transitions. [2021-07-13 20:42:02,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1264 transitions. [2021-07-13 20:42:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:02,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:02,077 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:02,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:02,297 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:02,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:02,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1992513178, now seen corresponding path program 8 times [2021-07-13 20:42:02,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:02,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396585001] [2021-07-13 20:42:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:02,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:02,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396585001] [2021-07-13 20:42:02,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396585001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:02,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138561855] [2021-07-13 20:42:02,332 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:02,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:02,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:02,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:42:02,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:02,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138561855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:02,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:02,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:42:02,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546822748] [2021-07-13 20:42:02,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:02,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:02,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:02,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:02,453 INFO L87 Difference]: Start difference. First operand 400 states and 1264 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:02,974 INFO L93 Difference]: Finished difference Result 1308 states and 3890 transitions. [2021-07-13 20:42:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:42:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 26 [2021-07-13 20:42:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:02,980 INFO L225 Difference]: With dead ends: 1308 [2021-07-13 20:42:02,981 INFO L226 Difference]: Without dead ends: 1308 [2021-07-13 20:42:02,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:42:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-07-13 20:42:02,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 415. [2021-07-13 20:42:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-07-13 20:42:02,993 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-07-13 20:42:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:02,994 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-07-13 20:42:02,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-07-13 20:42:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:02,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:02,995 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:03,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:42:03,209 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:03,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1182457080, now seen corresponding path program 9 times [2021-07-13 20:42:03,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:03,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716164242] [2021-07-13 20:42:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:03,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:03,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716164242] [2021-07-13 20:42:03,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716164242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:03,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255814741] [2021-07-13 20:42:03,259 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:03,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:42:03,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:03,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:42:03,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:03,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255814741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:03,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:03,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:42:03,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330747344] [2021-07-13 20:42:03,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:03,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:03,361 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:03,736 INFO L93 Difference]: Finished difference Result 1124 states and 3354 transitions. [2021-07-13 20:42:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:42:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:03,740 INFO L225 Difference]: With dead ends: 1124 [2021-07-13 20:42:03,740 INFO L226 Difference]: Without dead ends: 1120 [2021-07-13 20:42:03,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:42:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-07-13 20:42:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 421. [2021-07-13 20:42:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.2333333333333334) internal successors, (1358), 420 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1358 transitions. [2021-07-13 20:42:03,751 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1358 transitions. Word has length 26 [2021-07-13 20:42:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:03,751 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1358 transitions. [2021-07-13 20:42:03,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1358 transitions. [2021-07-13 20:42:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:03,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:03,753 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:03,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:03,969 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:03,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1452966772, now seen corresponding path program 10 times [2021-07-13 20:42:03,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:03,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159822454] [2021-07-13 20:42:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:04,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159822454] [2021-07-13 20:42:04,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159822454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:04,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375210065] [2021-07-13 20:42:04,005 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:04,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:04,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:04,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:42:04,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:04,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375210065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:04,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:04,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:42:04,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890583279] [2021-07-13 20:42:04,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:04,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:04,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:04,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:04,113 INFO L87 Difference]: Start difference. First operand 421 states and 1358 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:04,482 INFO L93 Difference]: Finished difference Result 1207 states and 3549 transitions. [2021-07-13 20:42:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:42:04,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:42:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:04,486 INFO L225 Difference]: With dead ends: 1207 [2021-07-13 20:42:04,486 INFO L226 Difference]: Without dead ends: 1207 [2021-07-13 20:42:04,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:42:04,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-07-13 20:42:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 415. [2021-07-13 20:42:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-07-13 20:42:04,497 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-07-13 20:42:04,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:04,498 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-07-13 20:42:04,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-07-13 20:42:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:04,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:04,499 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:04,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:04,715 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:04,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:04,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2037994958, now seen corresponding path program 11 times [2021-07-13 20:42:04,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:04,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570677673] [2021-07-13 20:42:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:04,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:04,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570677673] [2021-07-13 20:42:04,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570677673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:04,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681490834] [2021-07-13 20:42:04,750 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:04,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:42:04,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:04,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:42:04,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:04,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681490834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:04,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:04,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:42:04,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616346332] [2021-07-13 20:42:04,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:42:04,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:04,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:42:04,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:42:04,841 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:05,046 INFO L93 Difference]: Finished difference Result 824 states and 2512 transitions. [2021-07-13 20:42:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:42:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-07-13 20:42:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:05,050 INFO L225 Difference]: With dead ends: 824 [2021-07-13 20:42:05,050 INFO L226 Difference]: Without dead ends: 812 [2021-07-13 20:42:05,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:42:05,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-07-13 20:42:05,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 433. [2021-07-13 20:42:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.2175925925925926) internal successors, (1390), 432 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1390 transitions. [2021-07-13 20:42:05,058 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1390 transitions. Word has length 26 [2021-07-13 20:42:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:05,058 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1390 transitions. [2021-07-13 20:42:05,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1390 transitions. [2021-07-13 20:42:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:05,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:05,059 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:05,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 20:42:05,272 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:05,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:05,272 INFO L82 PathProgramCache]: Analyzing trace with hash 545990226, now seen corresponding path program 12 times [2021-07-13 20:42:05,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:05,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701261822] [2021-07-13 20:42:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:05,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:05,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701261822] [2021-07-13 20:42:05,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701261822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:05,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205724758] [2021-07-13 20:42:05,302 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:05,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:05,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:05,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:42:05,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:05,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205724758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:05,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:05,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:42:05,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691827291] [2021-07-13 20:42:05,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:42:05,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:05,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:42:05,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:42:05,400 INFO L87 Difference]: Start difference. First operand 433 states and 1390 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:05,703 INFO L93 Difference]: Finished difference Result 999 states and 2955 transitions. [2021-07-13 20:42:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:42:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-07-13 20:42:05,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:05,708 INFO L225 Difference]: With dead ends: 999 [2021-07-13 20:42:05,708 INFO L226 Difference]: Without dead ends: 995 [2021-07-13 20:42:05,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:42:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-07-13 20:42:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 472. [2021-07-13 20:42:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.2229299363057327) internal successors, (1518), 471 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1518 transitions. [2021-07-13 20:42:05,719 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1518 transitions. Word has length 26 [2021-07-13 20:42:05,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:05,719 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1518 transitions. [2021-07-13 20:42:05,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1518 transitions. [2021-07-13 20:42:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:05,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:05,721 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:05,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:42:05,937 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:05,937 INFO L82 PathProgramCache]: Analyzing trace with hash 816499918, now seen corresponding path program 13 times [2021-07-13 20:42:05,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:05,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525775818] [2021-07-13 20:42:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:05,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:05,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525775818] [2021-07-13 20:42:05,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525775818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:05,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139708138] [2021-07-13 20:42:05,971 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:05,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:42:05,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:06,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139708138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:06,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:06,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:42:06,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915645838] [2021-07-13 20:42:06,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:42:06,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:06,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:42:06,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:42:06,055 INFO L87 Difference]: Start difference. First operand 472 states and 1518 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:06,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:06,363 INFO L93 Difference]: Finished difference Result 1053 states and 3099 transitions. [2021-07-13 20:42:06,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:42:06,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-07-13 20:42:06,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:06,367 INFO L225 Difference]: With dead ends: 1053 [2021-07-13 20:42:06,367 INFO L226 Difference]: Without dead ends: 1053 [2021-07-13 20:42:06,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:42:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-07-13 20:42:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 464. [2021-07-13 20:42:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.2311015118790496) internal successors, (1496), 463 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1496 transitions. [2021-07-13 20:42:06,377 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1496 transitions. Word has length 26 [2021-07-13 20:42:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:06,377 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1496 transitions. [2021-07-13 20:42:06,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1496 transitions. [2021-07-13 20:42:06,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:06,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:06,378 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:06,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:42:06,594 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:06,595 INFO L82 PathProgramCache]: Analyzing trace with hash -980752764, now seen corresponding path program 1 times [2021-07-13 20:42:06,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:06,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501319742] [2021-07-13 20:42:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:06,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:06,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501319742] [2021-07-13 20:42:06,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501319742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:06,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170868703] [2021-07-13 20:42:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:06,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:42:06,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:07,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:42:07,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:07,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:07,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:42:07,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-07-13 20:42:07,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:07,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:42:07,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:07,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:07,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:07,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-07-13 20:42:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:07,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170868703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:07,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:07,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:42:07,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586129112] [2021-07-13 20:42:07,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:42:07,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:07,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:42:07,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:42:07,159 INFO L87 Difference]: Start difference. First operand 464 states and 1496 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:07,581 INFO L93 Difference]: Finished difference Result 853 states and 2545 transitions. [2021-07-13 20:42:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:42:07,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:07,584 INFO L225 Difference]: With dead ends: 853 [2021-07-13 20:42:07,584 INFO L226 Difference]: Without dead ends: 766 [2021-07-13 20:42:07,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:42:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-07-13 20:42:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 490. [2021-07-13 20:42:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.216768916155419) internal successors, (1573), 489 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1573 transitions. [2021-07-13 20:42:07,593 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1573 transitions. Word has length 28 [2021-07-13 20:42:07,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:07,593 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1573 transitions. [2021-07-13 20:42:07,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,593 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1573 transitions. [2021-07-13 20:42:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:07,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:07,594 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:07,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:07,809 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:07,809 INFO L82 PathProgramCache]: Analyzing trace with hash 735427332, now seen corresponding path program 2 times [2021-07-13 20:42:07,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:07,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501162527] [2021-07-13 20:42:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:08,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:08,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501162527] [2021-07-13 20:42:08,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501162527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:08,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146555446] [2021-07-13 20:42:08,107 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:08,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:08,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:42:08,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:08,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:42:08,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:08,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:08,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-13 20:42:08,301 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:42:08,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:42:08,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:08,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:08,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:08,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-07-13 20:42:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:42:08,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146555446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:08,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:08,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-07-13 20:42:08,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123359280] [2021-07-13 20:42:08,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:42:08,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:08,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:42:08,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:08,393 INFO L87 Difference]: Start difference. First operand 490 states and 1573 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:09,818 INFO L93 Difference]: Finished difference Result 1130 states and 3345 transitions. [2021-07-13 20:42:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:42:09,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:09,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:09,821 INFO L225 Difference]: With dead ends: 1130 [2021-07-13 20:42:09,821 INFO L226 Difference]: Without dead ends: 998 [2021-07-13 20:42:09,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1282.8ms TimeCoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:42:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-07-13 20:42:09,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 537. [2021-07-13 20:42:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1940298507462686) internal successors, (1712), 536 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-07-13 20:42:09,835 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 28 [2021-07-13 20:42:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:09,835 INFO L482 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-07-13 20:42:09,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-07-13 20:42:09,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:09,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:09,837 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:10,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:42:10,049 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:10,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:10,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1417721472, now seen corresponding path program 14 times [2021-07-13 20:42:10,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:10,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851845958] [2021-07-13 20:42:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:10,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851845958] [2021-07-13 20:42:10,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851845958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426921716] [2021-07-13 20:42:10,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:10,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:10,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:10,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:42:10,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:10,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:42:10,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:10,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:10,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:10,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-07-13 20:42:10,547 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:42:10,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:42:10,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:10,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:10,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:10,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-07-13 20:42:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:42:10,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426921716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:10,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:10,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-13 20:42:10,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800928198] [2021-07-13 20:42:10,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:42:10,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:10,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:42:10,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:42:10,652 INFO L87 Difference]: Start difference. First operand 537 states and 1712 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:11,939 INFO L93 Difference]: Finished difference Result 1024 states and 3050 transitions. [2021-07-13 20:42:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:42:11,939 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:11,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:11,942 INFO L225 Difference]: With dead ends: 1024 [2021-07-13 20:42:11,942 INFO L226 Difference]: Without dead ends: 946 [2021-07-13 20:42:11,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1184.2ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:42:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-07-13 20:42:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 637. [2021-07-13 20:42:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.10062893081761) internal successors, (1972), 636 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1972 transitions. [2021-07-13 20:42:11,967 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1972 transitions. Word has length 28 [2021-07-13 20:42:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:11,967 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1972 transitions. [2021-07-13 20:42:11,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1972 transitions. [2021-07-13 20:42:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:11,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:11,969 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:12,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:42:12,169 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash 916230348, now seen corresponding path program 3 times [2021-07-13 20:42:12,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:12,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668197867] [2021-07-13 20:42:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:12,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:12,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668197867] [2021-07-13 20:42:12,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668197867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:12,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043989924] [2021-07-13 20:42:12,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:12,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:42:12,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:42:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:12,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:42:12,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:12,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:12,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:12,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-13 20:42:12,638 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:42:12,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:42:12,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:12,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:12,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:12,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-07-13 20:42:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:42:12,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043989924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:12,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:12,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-07-13 20:42:12,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624560893] [2021-07-13 20:42:12,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:42:12,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:12,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:42:12,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:12,818 INFO L87 Difference]: Start difference. First operand 637 states and 1972 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:14,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:14,990 INFO L93 Difference]: Finished difference Result 1838 states and 5313 transitions. [2021-07-13 20:42:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:42:14,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:14,997 INFO L225 Difference]: With dead ends: 1838 [2021-07-13 20:42:14,997 INFO L226 Difference]: Without dead ends: 1655 [2021-07-13 20:42:14,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1851.1ms TimeCoverageRelationStatistics Valid=569, Invalid=3091, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:42:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-07-13 20:42:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 692. [2021-07-13 20:42:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.1577424023154848) internal successors, (2182), 691 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2182 transitions. [2021-07-13 20:42:15,012 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2182 transitions. Word has length 28 [2021-07-13 20:42:15,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:15,013 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2182 transitions. [2021-07-13 20:42:15,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2182 transitions. [2021-07-13 20:42:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:15,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:15,014 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:15,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:15,217 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:15,217 INFO L82 PathProgramCache]: Analyzing trace with hash 937707268, now seen corresponding path program 15 times [2021-07-13 20:42:15,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:15,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289215773] [2021-07-13 20:42:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:15,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:15,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289215773] [2021-07-13 20:42:15,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289215773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:15,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213754328] [2021-07-13 20:42:15,487 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 [2021-07-13 20:42:15,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:42:15,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:15,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:42:15,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:42:15,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:15,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:15,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-13 20:42:15,707 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:42:15,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:42:15,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:15,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:15,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-07-13 20:42:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:42:15,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213754328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:15,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:15,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-13 20:42:15,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432360968] [2021-07-13 20:42:15,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:42:15,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:15,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:42:15,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:42:15,802 INFO L87 Difference]: Start difference. First operand 692 states and 2182 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:17,154 INFO L93 Difference]: Finished difference Result 1136 states and 3439 transitions. [2021-07-13 20:42:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:42:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:17,156 INFO L225 Difference]: With dead ends: 1136 [2021-07-13 20:42:17,156 INFO L226 Difference]: Without dead ends: 1058 [2021-07-13 20:42:17,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1195.7ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:42:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-07-13 20:42:17,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 680. [2021-07-13 20:42:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.1723122238586154) internal successors, (2154), 679 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2154 transitions. [2021-07-13 20:42:17,168 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2154 transitions. Word has length 28 [2021-07-13 20:42:17,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:17,169 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2154 transitions. [2021-07-13 20:42:17,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:17,169 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2154 transitions. [2021-07-13 20:42:17,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:17,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:17,170 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:17,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:17,377 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:17,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1490293068, now seen corresponding path program 16 times [2021-07-13 20:42:17,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:17,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579434038] [2021-07-13 20:42:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:17,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:17,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579434038] [2021-07-13 20:42:17,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579434038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:17,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488823640] [2021-07-13 20:42:17,649 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) [2021-07-13 20:42:17,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:17,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:42:17,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:17,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-13 20:42:17,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:17,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:17,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:42:17,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-07-13 20:42:17,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:17,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-07-13 20:42:17,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:17,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:17,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:17,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-07-13 20:42:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:17,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488823640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:17,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:17,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-07-13 20:42:17,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117108734] [2021-07-13 20:42:17,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:42:17,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:17,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:42:17,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:42:17,951 INFO L87 Difference]: Start difference. First operand 680 states and 2154 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:19,936 INFO L93 Difference]: Finished difference Result 1629 states and 4937 transitions. [2021-07-13 20:42:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:42:19,936 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:42:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:19,939 INFO L225 Difference]: With dead ends: 1629 [2021-07-13 20:42:19,939 INFO L226 Difference]: Without dead ends: 1293 [2021-07-13 20:42:19,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1759.9ms TimeCoverageRelationStatistics Valid=735, Invalid=3425, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:42:19,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-07-13 20:42:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 920. [2021-07-13 20:42:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.263329706202394) internal successors, (2999), 919 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2999 transitions. [2021-07-13 20:42:19,955 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2999 transitions. Word has length 28 [2021-07-13 20:42:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:19,955 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2999 transitions. [2021-07-13 20:42:19,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2999 transitions. [2021-07-13 20:42:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:19,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:19,957 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:20,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:20,172 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:20,173 INFO L82 PathProgramCache]: Analyzing trace with hash -836691140, now seen corresponding path program 4 times [2021-07-13 20:42:20,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:20,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623712243] [2021-07-13 20:42:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:20,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:20,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623712243] [2021-07-13 20:42:20,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623712243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:20,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143750248] [2021-07-13 20:42:20,555 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:20,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:20,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:20,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:42:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:20,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:42:20,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:20,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:20,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:42:20,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-07-13 20:42:20,725 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:42:20,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:42:20,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:20,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:20,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:20,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-07-13 20:42:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:42:20,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143750248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:20,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:20,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-07-13 20:42:20,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310854168] [2021-07-13 20:42:20,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:42:20,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:20,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:42:20,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:20,826 INFO L87 Difference]: Start difference. First operand 920 states and 2999 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:22,116 INFO L93 Difference]: Finished difference Result 1908 states and 5865 transitions. [2021-07-13 20:42:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:42:22,116 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:22,120 INFO L225 Difference]: With dead ends: 1908 [2021-07-13 20:42:22,120 INFO L226 Difference]: Without dead ends: 1792 [2021-07-13 20:42:22,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1344.0ms TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:42:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-07-13 20:42:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1049. [2021-07-13 20:42:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.25381679389313) internal successors, (3410), 1048 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3410 transitions. [2021-07-13 20:42:22,141 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3410 transitions. Word has length 28 [2021-07-13 20:42:22,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:22,141 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 3410 transitions. [2021-07-13 20:42:22,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:22,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3410 transitions. [2021-07-13 20:42:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:22,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:22,143 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:22,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:42:22,357 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:22,357 INFO L82 PathProgramCache]: Analyzing trace with hash -556203584, now seen corresponding path program 5 times [2021-07-13 20:42:22,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:22,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43320073] [2021-07-13 20:42:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:22,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:22,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43320073] [2021-07-13 20:42:22,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43320073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:22,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568473232] [2021-07-13 20:42:22,610 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:22,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:42:22,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:22,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:42:22,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:22,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:42:22,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:22,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:22,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:42:22,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-07-13 20:42:22,771 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:42:22,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:42:22,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:22,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:22,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:22,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:32 [2021-07-13 20:42:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:22,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568473232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:22,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:22,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 20:42:22,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981941356] [2021-07-13 20:42:22,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:42:22,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:22,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:42:22,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:22,919 INFO L87 Difference]: Start difference. First operand 1049 states and 3410 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:24,900 INFO L93 Difference]: Finished difference Result 1982 states and 6072 transitions. [2021-07-13 20:42:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:42:24,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:24,904 INFO L225 Difference]: With dead ends: 1982 [2021-07-13 20:42:24,904 INFO L226 Difference]: Without dead ends: 1756 [2021-07-13 20:42:24,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1731.2ms TimeCoverageRelationStatistics Valid=554, Invalid=2416, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:42:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-07-13 20:42:24,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1070. [2021-07-13 20:42:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.2198316183348923) internal successors, (3442), 1069 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3442 transitions. [2021-07-13 20:42:24,923 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3442 transitions. Word has length 28 [2021-07-13 20:42:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:24,923 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 3442 transitions. [2021-07-13 20:42:24,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3442 transitions. [2021-07-13 20:42:24,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:24,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:24,925 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:25,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:42:25,141 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:25,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:25,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1520630964, now seen corresponding path program 6 times [2021-07-13 20:42:25,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:25,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293935718] [2021-07-13 20:42:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:25,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:25,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293935718] [2021-07-13 20:42:25,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293935718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:25,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255477482] [2021-07-13 20:42:25,497 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:25,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:25,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:42:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:25,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:42:25,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:25,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:25,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:42:25,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-07-13 20:42:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:25,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:42:25,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:25,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:25,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:25,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-07-13 20:42:25,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:25,753 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-13 20:42:25,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:42:25,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:25,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:25,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:25,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-07-13 20:42:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:25,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255477482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:25,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:25,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-07-13 20:42:25,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196462353] [2021-07-13 20:42:25,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:42:25,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:25,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:42:25,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:42:25,913 INFO L87 Difference]: Start difference. First operand 1070 states and 3442 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:27,625 INFO L93 Difference]: Finished difference Result 2007 states and 6151 transitions. [2021-07-13 20:42:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:42:27,626 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:27,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:27,630 INFO L225 Difference]: With dead ends: 2007 [2021-07-13 20:42:27,630 INFO L226 Difference]: Without dead ends: 1842 [2021-07-13 20:42:27,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1402.0ms TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:42:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-07-13 20:42:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1157. [2021-07-13 20:42:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 3.222318339100346) internal successors, (3725), 1156 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3725 transitions. [2021-07-13 20:42:27,657 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3725 transitions. Word has length 28 [2021-07-13 20:42:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:27,657 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3725 transitions. [2021-07-13 20:42:27,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3725 transitions. [2021-07-13 20:42:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:27,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:27,659 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:27,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:27,865 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:27,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:27,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1530790852, now seen corresponding path program 7 times [2021-07-13 20:42:27,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:27,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90690990] [2021-07-13 20:42:27,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:28,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:28,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90690990] [2021-07-13 20:42:28,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90690990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:28,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098006165] [2021-07-13 20:42:28,217 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:28,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:42:28,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:28,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:42:28,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:28,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:28,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:42:28,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-07-13 20:42:28,400 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:42:28,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:42:28,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:28,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:28,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:28,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:37 [2021-07-13 20:42:28,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:28,468 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-07-13 20:42:28,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:42:28,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:28,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:28,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:28,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:44 [2021-07-13 20:42:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:28,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098006165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:28,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:28,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:42:28,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331560180] [2021-07-13 20:42:28,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:42:28,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:28,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:42:28,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:42:28,632 INFO L87 Difference]: Start difference. First operand 1157 states and 3725 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:29,375 INFO L93 Difference]: Finished difference Result 2244 states and 7072 transitions. [2021-07-13 20:42:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:42:29,375 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:29,379 INFO L225 Difference]: With dead ends: 2244 [2021-07-13 20:42:29,379 INFO L226 Difference]: Without dead ends: 1887 [2021-07-13 20:42:29,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 831.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:42:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-07-13 20:42:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1173. [2021-07-13 20:42:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.2380546075085324) internal successors, (3795), 1172 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3795 transitions. [2021-07-13 20:42:29,399 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3795 transitions. Word has length 28 [2021-07-13 20:42:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:29,399 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3795 transitions. [2021-07-13 20:42:29,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3795 transitions. [2021-07-13 20:42:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:29,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:29,401 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:29,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:42:29,617 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:29,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:29,617 INFO L82 PathProgramCache]: Analyzing trace with hash 55569732, now seen corresponding path program 8 times [2021-07-13 20:42:29,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:29,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730191374] [2021-07-13 20:42:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:30,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:30,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730191374] [2021-07-13 20:42:30,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730191374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:30,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577151065] [2021-07-13 20:42:30,063 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:30,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:30,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:42:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:30,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:42:30,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:30,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:30,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:42:30,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-07-13 20:42:30,240 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:42:30,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:42:30,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:30,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:30,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:30,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-07-13 20:42:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:30,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577151065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:30,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:30,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-07-13 20:42:30,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616175687] [2021-07-13 20:42:30,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:42:30,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:30,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:42:30,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:30,362 INFO L87 Difference]: Start difference. First operand 1173 states and 3795 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:31,032 INFO L93 Difference]: Finished difference Result 2027 states and 6489 transitions. [2021-07-13 20:42:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:42:31,032 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:31,044 INFO L225 Difference]: With dead ends: 2027 [2021-07-13 20:42:31,044 INFO L226 Difference]: Without dead ends: 1705 [2021-07-13 20:42:31,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 856.2ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:42:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-07-13 20:42:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1135. [2021-07-13 20:42:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.236331569664903) internal successors, (3670), 1134 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3670 transitions. [2021-07-13 20:42:31,067 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3670 transitions. Word has length 28 [2021-07-13 20:42:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:31,067 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 3670 transitions. [2021-07-13 20:42:31,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3670 transitions. [2021-07-13 20:42:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:31,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:31,069 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:31,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:31,285 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:31,285 INFO L82 PathProgramCache]: Analyzing trace with hash 915430826, now seen corresponding path program 9 times [2021-07-13 20:42:31,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:31,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747044915] [2021-07-13 20:42:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:31,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:31,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747044915] [2021-07-13 20:42:31,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747044915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:31,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165791836] [2021-07-13 20:42:31,331 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:31,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:42:31,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:31,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:31,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:31,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165791836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:31,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:31,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:42:31,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297859126] [2021-07-13 20:42:31,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:31,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:31,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:31,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:31,462 INFO L87 Difference]: Start difference. First operand 1135 states and 3670 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:32,809 INFO L93 Difference]: Finished difference Result 5166 states and 15294 transitions. [2021-07-13 20:42:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:42:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:32,818 INFO L225 Difference]: With dead ends: 5166 [2021-07-13 20:42:32,818 INFO L226 Difference]: Without dead ends: 5166 [2021-07-13 20:42:32,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 912.8ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:42:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-07-13 20:42:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 1295. [2021-07-13 20:42:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.3377125193199384) internal successors, (4319), 1294 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4319 transitions. [2021-07-13 20:42:32,871 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4319 transitions. Word has length 30 [2021-07-13 20:42:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:32,871 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4319 transitions. [2021-07-13 20:42:32,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:32,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4319 transitions. [2021-07-13 20:42:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:32,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:32,874 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:33,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:42:33,081 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:33,081 INFO L82 PathProgramCache]: Analyzing trace with hash 930891622, now seen corresponding path program 10 times [2021-07-13 20:42:33,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:33,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832654431] [2021-07-13 20:42:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:33,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:33,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832654431] [2021-07-13 20:42:33,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832654431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:33,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965399715] [2021-07-13 20:42:33,124 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:33,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:33,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:33,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:33,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965399715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:33,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:33,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:42:33,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749724223] [2021-07-13 20:42:33,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:33,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:33,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:33,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:33,253 INFO L87 Difference]: Start difference. First operand 1295 states and 4319 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:34,618 INFO L93 Difference]: Finished difference Result 5273 states and 15409 transitions. [2021-07-13 20:42:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:42:34,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:34,626 INFO L225 Difference]: With dead ends: 5273 [2021-07-13 20:42:34,627 INFO L226 Difference]: Without dead ends: 5273 [2021-07-13 20:42:34,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 898.3ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:42:34,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-07-13 20:42:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 1261. [2021-07-13 20:42:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.3119047619047617) internal successors, (4173), 1260 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4173 transitions. [2021-07-13 20:42:34,665 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4173 transitions. Word has length 30 [2021-07-13 20:42:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:34,666 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4173 transitions. [2021-07-13 20:42:34,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4173 transitions. [2021-07-13 20:42:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:34,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:34,668 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:34,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:42:34,881 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:34,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:34,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1624165858, now seen corresponding path program 11 times [2021-07-13 20:42:34,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:34,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407102029] [2021-07-13 20:42:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:34,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:34,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407102029] [2021-07-13 20:42:34,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407102029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:34,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791631574] [2021-07-13 20:42:34,914 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:34,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:42:34,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:34,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:34,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:35,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791631574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:35,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:35,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:42:35,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75630590] [2021-07-13 20:42:35,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:35,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:35,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:35,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:35,040 INFO L87 Difference]: Start difference. First operand 1261 states and 4173 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:35,803 INFO L93 Difference]: Finished difference Result 3862 states and 11266 transitions. [2021-07-13 20:42:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:42:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:35,809 INFO L225 Difference]: With dead ends: 3862 [2021-07-13 20:42:35,809 INFO L226 Difference]: Without dead ends: 3862 [2021-07-13 20:42:35,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=747, Invalid=2793, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:42:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-07-13 20:42:35,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 1267. [2021-07-13 20:42:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.3143759873617693) internal successors, (4196), 1266 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4196 transitions. [2021-07-13 20:42:35,846 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4196 transitions. Word has length 30 [2021-07-13 20:42:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:35,846 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 4196 transitions. [2021-07-13 20:42:35,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4196 transitions. [2021-07-13 20:42:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:35,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:35,848 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:36,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:42:36,057 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:36,057 INFO L82 PathProgramCache]: Analyzing trace with hash 568788464, now seen corresponding path program 12 times [2021-07-13 20:42:36,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:36,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239067400] [2021-07-13 20:42:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:36,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:36,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239067400] [2021-07-13 20:42:36,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239067400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:36,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996510881] [2021-07-13 20:42:36,092 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:36,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:36,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:36,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:36,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:36,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996510881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:36,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:36,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:42:36,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317786019] [2021-07-13 20:42:36,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:36,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:36,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:36,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:36,202 INFO L87 Difference]: Start difference. First operand 1267 states and 4196 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:36,928 INFO L93 Difference]: Finished difference Result 3689 states and 10863 transitions. [2021-07-13 20:42:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:42:36,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:36,934 INFO L225 Difference]: With dead ends: 3689 [2021-07-13 20:42:36,934 INFO L226 Difference]: Without dead ends: 3673 [2021-07-13 20:42:36,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 444.7ms TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:42:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2021-07-13 20:42:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 1255. [2021-07-13 20:42:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.3038277511961724) internal successors, (4143), 1254 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4143 transitions. [2021-07-13 20:42:36,965 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4143 transitions. Word has length 30 [2021-07-13 20:42:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:36,965 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4143 transitions. [2021-07-13 20:42:36,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4143 transitions. [2021-07-13 20:42:36,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:36,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:36,967 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:37,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:37,168 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:37,168 INFO L82 PathProgramCache]: Analyzing trace with hash -707538508, now seen corresponding path program 13 times [2021-07-13 20:42:37,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:37,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760400376] [2021-07-13 20:42:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:37,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:37,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760400376] [2021-07-13 20:42:37,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760400376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:37,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525945298] [2021-07-13 20:42:37,215 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:37,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:37,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:37,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525945298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:37,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:37,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:42:37,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060872960] [2021-07-13 20:42:37,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:37,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:37,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:37,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:37,318 INFO L87 Difference]: Start difference. First operand 1255 states and 4143 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:38,057 INFO L93 Difference]: Finished difference Result 4077 states and 11802 transitions. [2021-07-13 20:42:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:42:38,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:38,064 INFO L225 Difference]: With dead ends: 4077 [2021-07-13 20:42:38,064 INFO L226 Difference]: Without dead ends: 4053 [2021-07-13 20:42:38,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=680, Invalid=2400, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:42:38,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-07-13 20:42:38,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 1269. [2021-07-13 20:42:38,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.2981072555205047) internal successors, (4182), 1268 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4182 transitions. [2021-07-13 20:42:38,095 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4182 transitions. Word has length 30 [2021-07-13 20:42:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:38,095 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4182 transitions. [2021-07-13 20:42:38,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4182 transitions. [2021-07-13 20:42:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:38,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:38,097 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:38,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:42:38,298 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:38,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:38,298 INFO L82 PathProgramCache]: Analyzing trace with hash -437028816, now seen corresponding path program 14 times [2021-07-13 20:42:38,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:38,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072872844] [2021-07-13 20:42:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:38,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:38,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072872844] [2021-07-13 20:42:38,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072872844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:38,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650084051] [2021-07-13 20:42:38,345 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:38,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:38,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:38,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:38,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650084051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:38,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:38,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:42:38,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501089692] [2021-07-13 20:42:38,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:38,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:38,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:38,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:38,456 INFO L87 Difference]: Start difference. First operand 1269 states and 4182 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:39,247 INFO L93 Difference]: Finished difference Result 4229 states and 12165 transitions. [2021-07-13 20:42:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:42:39,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:39,253 INFO L225 Difference]: With dead ends: 4229 [2021-07-13 20:42:39,254 INFO L226 Difference]: Without dead ends: 4229 [2021-07-13 20:42:39,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=757, Invalid=2783, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:42:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2021-07-13 20:42:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 1092. [2021-07-13 20:42:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 3.1631530705774518) internal successors, (3451), 1091 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 3451 transitions. [2021-07-13 20:42:39,285 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 3451 transitions. Word has length 30 [2021-07-13 20:42:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:39,285 INFO L482 AbstractCegarLoop]: Abstraction has 1092 states and 3451 transitions. [2021-07-13 20:42:39,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 3451 transitions. [2021-07-13 20:42:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:39,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:39,286 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:39,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:39,502 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:39,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:39,502 INFO L82 PathProgramCache]: Analyzing trace with hash 333072554, now seen corresponding path program 15 times [2021-07-13 20:42:39,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:39,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687394653] [2021-07-13 20:42:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:39,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687394653] [2021-07-13 20:42:39,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687394653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354421070] [2021-07-13 20:42:39,536 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:39,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:42:39,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:39,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:39,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354421070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:39,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:39,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:42:39,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412838244] [2021-07-13 20:42:39,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:39,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:39,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:39,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:39,663 INFO L87 Difference]: Start difference. First operand 1092 states and 3451 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:40,514 INFO L93 Difference]: Finished difference Result 3880 states and 11526 transitions. [2021-07-13 20:42:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:42:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:40,520 INFO L225 Difference]: With dead ends: 3880 [2021-07-13 20:42:40,520 INFO L226 Difference]: Without dead ends: 3880 [2021-07-13 20:42:40,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 559.2ms TimeCoverageRelationStatistics Valid=788, Invalid=3244, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:42:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-07-13 20:42:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 1361. [2021-07-13 20:42:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.2536764705882355) internal successors, (4425), 1360 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4425 transitions. [2021-07-13 20:42:40,557 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4425 transitions. Word has length 30 [2021-07-13 20:42:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:40,557 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4425 transitions. [2021-07-13 20:42:40,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4425 transitions. [2021-07-13 20:42:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:40,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:40,559 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:40,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:42:40,773 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:40,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:40,773 INFO L82 PathProgramCache]: Analyzing trace with hash -722304840, now seen corresponding path program 16 times [2021-07-13 20:42:40,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:40,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923275946] [2021-07-13 20:42:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:40,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:40,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923275946] [2021-07-13 20:42:40,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923275946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:40,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733240068] [2021-07-13 20:42:40,803 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:40,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:40,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:40,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:40,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:40,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733240068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:40,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:40,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:42:40,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279277825] [2021-07-13 20:42:40,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:40,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:40,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:40,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:40,916 INFO L87 Difference]: Start difference. First operand 1361 states and 4425 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:41,647 INFO L93 Difference]: Finished difference Result 3700 states and 11089 transitions. [2021-07-13 20:42:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:42:41,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:41,653 INFO L225 Difference]: With dead ends: 3700 [2021-07-13 20:42:41,653 INFO L226 Difference]: Without dead ends: 3684 [2021-07-13 20:42:41,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=675, Invalid=2517, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:42:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2021-07-13 20:42:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 1355. [2021-07-13 20:42:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.2511078286558344) internal successors, (4402), 1354 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4402 transitions. [2021-07-13 20:42:41,681 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4402 transitions. Word has length 30 [2021-07-13 20:42:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:41,681 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4402 transitions. [2021-07-13 20:42:41,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4402 transitions. [2021-07-13 20:42:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:41,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:41,683 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:41,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:42:41,897 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:41,897 INFO L82 PathProgramCache]: Analyzing trace with hash 760830098, now seen corresponding path program 17 times [2021-07-13 20:42:41,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:41,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982522256] [2021-07-13 20:42:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:41,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:41,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982522256] [2021-07-13 20:42:41,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982522256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:41,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577859598] [2021-07-13 20:42:41,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:41,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:42:41,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:41,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:41,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:42,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577859598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:42,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:42,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:42:42,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112473646] [2021-07-13 20:42:42,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:42,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:42,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:42,027 INFO L87 Difference]: Start difference. First operand 1355 states and 4402 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:42,690 INFO L93 Difference]: Finished difference Result 3586 states and 10726 transitions. [2021-07-13 20:42:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:42:42,691 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:42,696 INFO L225 Difference]: With dead ends: 3586 [2021-07-13 20:42:42,696 INFO L226 Difference]: Without dead ends: 3538 [2021-07-13 20:42:42,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=596, Invalid=2160, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:42:42,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-07-13 20:42:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 1367. [2021-07-13 20:42:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.2423133235724744) internal successors, (4429), 1366 states have internal predecessors, (4429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4429 transitions. [2021-07-13 20:42:42,722 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4429 transitions. Word has length 30 [2021-07-13 20:42:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:42,722 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4429 transitions. [2021-07-13 20:42:42,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4429 transitions. [2021-07-13 20:42:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:42,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:42,724 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:42,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:42:42,925 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:42,925 INFO L82 PathProgramCache]: Analyzing trace with hash -150600370, now seen corresponding path program 18 times [2021-07-13 20:42:42,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:42,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072268301] [2021-07-13 20:42:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:42,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:42,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072268301] [2021-07-13 20:42:42,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072268301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:42,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648469479] [2021-07-13 20:42:42,965 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:42,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:42,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:42,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:42,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:43,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648469479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:43,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:43,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:42:43,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502340470] [2021-07-13 20:42:43,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:43,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:43,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:43,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:43,064 INFO L87 Difference]: Start difference. First operand 1367 states and 4429 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:43,678 INFO L93 Difference]: Finished difference Result 3947 states and 11608 transitions. [2021-07-13 20:42:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:42:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:43,685 INFO L225 Difference]: With dead ends: 3947 [2021-07-13 20:42:43,685 INFO L226 Difference]: Without dead ends: 3871 [2021-07-13 20:42:43,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:42:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-07-13 20:42:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 1381. [2021-07-13 20:42:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.2405797101449276) internal successors, (4472), 1380 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4472 transitions. [2021-07-13 20:42:43,717 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4472 transitions. Word has length 30 [2021-07-13 20:42:43,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:43,717 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4472 transitions. [2021-07-13 20:42:43,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4472 transitions. [2021-07-13 20:42:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:43,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:43,719 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:43,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:42:43,935 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:43,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1642605102, now seen corresponding path program 19 times [2021-07-13 20:42:43,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:43,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991598359] [2021-07-13 20:42:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:43,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:43,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991598359] [2021-07-13 20:42:43,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991598359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:43,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789084660] [2021-07-13 20:42:43,966 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:43,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:43,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:44,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789084660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:44,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:44,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:42:44,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572404158] [2021-07-13 20:42:44,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:44,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:44,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:44,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:44,057 INFO L87 Difference]: Start difference. First operand 1381 states and 4472 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:44,743 INFO L93 Difference]: Finished difference Result 3759 states and 11296 transitions. [2021-07-13 20:42:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:42:44,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:44,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:44,749 INFO L225 Difference]: With dead ends: 3759 [2021-07-13 20:42:44,749 INFO L226 Difference]: Without dead ends: 3739 [2021-07-13 20:42:44,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=649, Invalid=2431, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:42:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-07-13 20:42:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 1571. [2021-07-13 20:42:44,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.186624203821656) internal successors, (5003), 1570 states have internal predecessors, (5003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5003 transitions. [2021-07-13 20:42:44,780 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5003 transitions. Word has length 30 [2021-07-13 20:42:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:44,780 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 5003 transitions. [2021-07-13 20:42:44,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5003 transitions. [2021-07-13 20:42:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:44,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:44,782 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:44,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:42:44,987 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1372095410, now seen corresponding path program 20 times [2021-07-13 20:42:44,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:44,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630455456] [2021-07-13 20:42:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:45,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:45,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630455456] [2021-07-13 20:42:45,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630455456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:45,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558771935] [2021-07-13 20:42:45,028 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:45,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:45,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:45,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:45,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558771935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:45,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:45,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:42:45,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99019137] [2021-07-13 20:42:45,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:45,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:45,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:45,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:45,126 INFO L87 Difference]: Start difference. First operand 1571 states and 5003 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:45,921 INFO L93 Difference]: Finished difference Result 4002 states and 11899 transitions. [2021-07-13 20:42:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:42:45,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:45,927 INFO L225 Difference]: With dead ends: 4002 [2021-07-13 20:42:45,927 INFO L226 Difference]: Without dead ends: 4002 [2021-07-13 20:42:45,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 531.1ms TimeCoverageRelationStatistics Valid=869, Invalid=3291, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:42:45,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-07-13 20:42:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 1386. [2021-07-13 20:42:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.2368231046931406) internal successors, (4483), 1385 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4483 transitions. [2021-07-13 20:42:45,958 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4483 transitions. Word has length 30 [2021-07-13 20:42:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:45,958 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 4483 transitions. [2021-07-13 20:42:45,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4483 transitions. [2021-07-13 20:42:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:45,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:45,960 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:46,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:42:46,161 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:46,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1532772694, now seen corresponding path program 21 times [2021-07-13 20:42:46,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:46,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56905549] [2021-07-13 20:42:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:46,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:46,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56905549] [2021-07-13 20:42:46,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56905549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:46,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365588597] [2021-07-13 20:42:46,204 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:46,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:42:46,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:46,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:46,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:46,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365588597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:46,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:46,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:42:46,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659877529] [2021-07-13 20:42:46,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:46,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:46,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:46,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:46,334 INFO L87 Difference]: Start difference. First operand 1386 states and 4483 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:47,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:47,544 INFO L93 Difference]: Finished difference Result 5413 states and 16415 transitions. [2021-07-13 20:42:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:42:47,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:47,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:47,553 INFO L225 Difference]: With dead ends: 5413 [2021-07-13 20:42:47,553 INFO L226 Difference]: Without dead ends: 5413 [2021-07-13 20:42:47,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 825.2ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:42:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-07-13 20:42:47,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 1890. [2021-07-13 20:42:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.338803599788248) internal successors, (6307), 1889 states have internal predecessors, (6307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6307 transitions. [2021-07-13 20:42:47,601 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6307 transitions. Word has length 30 [2021-07-13 20:42:47,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:47,601 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 6307 transitions. [2021-07-13 20:42:47,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6307 transitions. [2021-07-13 20:42:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:47,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:47,604 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:47,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:42:47,804 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:47,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1706817208, now seen corresponding path program 22 times [2021-07-13 20:42:47,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:47,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668949860] [2021-07-13 20:42:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:47,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:47,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668949860] [2021-07-13 20:42:47,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668949860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:47,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541281426] [2021-07-13 20:42:47,845 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:47,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:47,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:47,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:47,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541281426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:47,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:47,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:42:47,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028476902] [2021-07-13 20:42:47,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:47,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:47,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:47,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:47,966 INFO L87 Difference]: Start difference. First operand 1890 states and 6307 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:49,050 INFO L93 Difference]: Finished difference Result 5130 states and 15678 transitions. [2021-07-13 20:42:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:42:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:49,060 INFO L225 Difference]: With dead ends: 5130 [2021-07-13 20:42:49,060 INFO L226 Difference]: Without dead ends: 5114 [2021-07-13 20:42:49,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 722.5ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:42:49,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2021-07-13 20:42:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 1830. [2021-07-13 20:42:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 3.348824494259158) internal successors, (6125), 1829 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 6125 transitions. [2021-07-13 20:42:49,107 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 6125 transitions. Word has length 30 [2021-07-13 20:42:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:49,108 INFO L482 AbstractCegarLoop]: Abstraction has 1830 states and 6125 transitions. [2021-07-13 20:42:49,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 6125 transitions. [2021-07-13 20:42:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:49,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:49,111 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:49,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:42:49,318 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:49,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1105015150, now seen corresponding path program 23 times [2021-07-13 20:42:49,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:49,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633699408] [2021-07-13 20:42:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:49,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:49,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633699408] [2021-07-13 20:42:49,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633699408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:49,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615846971] [2021-07-13 20:42:49,361 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:49,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:42:49,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:49,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:49,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:49,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615846971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:49,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:49,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:42:49,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359013964] [2021-07-13 20:42:49,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:49,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:49,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:49,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:49,483 INFO L87 Difference]: Start difference. First operand 1830 states and 6125 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:50,296 INFO L93 Difference]: Finished difference Result 4815 states and 14976 transitions. [2021-07-13 20:42:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:42:50,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:50,304 INFO L225 Difference]: With dead ends: 4815 [2021-07-13 20:42:50,304 INFO L226 Difference]: Without dead ends: 4767 [2021-07-13 20:42:50,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:42:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2021-07-13 20:42:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 1882. [2021-07-13 20:42:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.334928229665072) internal successors, (6273), 1881 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6273 transitions. [2021-07-13 20:42:50,352 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6273 transitions. Word has length 30 [2021-07-13 20:42:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:50,352 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6273 transitions. [2021-07-13 20:42:50,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6273 transitions. [2021-07-13 20:42:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:50,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:50,355 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:50,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:50,561 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:50,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:50,561 INFO L82 PathProgramCache]: Analyzing trace with hash 441056662, now seen corresponding path program 24 times [2021-07-13 20:42:50,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:50,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30836270] [2021-07-13 20:42:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:50,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:50,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30836270] [2021-07-13 20:42:50,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30836270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:50,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420354095] [2021-07-13 20:42:50,601 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:50,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:50,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:50,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:50,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:50,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420354095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:50,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:50,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:42:50,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602327943] [2021-07-13 20:42:50,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:50,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:50,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:50,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:50,723 INFO L87 Difference]: Start difference. First operand 1882 states and 6273 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:51,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:51,508 INFO L93 Difference]: Finished difference Result 4941 states and 15164 transitions. [2021-07-13 20:42:51,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:42:51,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:51,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:51,516 INFO L225 Difference]: With dead ends: 4941 [2021-07-13 20:42:51,516 INFO L226 Difference]: Without dead ends: 4861 [2021-07-13 20:42:51,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 512.0ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:42:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-07-13 20:42:51,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 2178. [2021-07-13 20:42:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 3.3674781809830043) internal successors, (7331), 2177 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 7331 transitions. [2021-07-13 20:42:51,583 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 7331 transitions. Word has length 30 [2021-07-13 20:42:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:51,583 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 7331 transitions. [2021-07-13 20:42:51,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 7331 transitions. [2021-07-13 20:42:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:51,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:51,587 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:51,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:51,787 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1158883238, now seen corresponding path program 25 times [2021-07-13 20:42:51,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:51,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3421180] [2021-07-13 20:42:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:51,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:51,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3421180] [2021-07-13 20:42:51,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3421180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:51,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620341467] [2021-07-13 20:42:51,818 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:51,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:51,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:51,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620341467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:51,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:51,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:51,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932464057] [2021-07-13 20:42:51,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:51,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:51,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:51,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:51,946 INFO L87 Difference]: Start difference. First operand 2178 states and 7331 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:52,777 INFO L93 Difference]: Finished difference Result 6842 states and 21215 transitions. [2021-07-13 20:42:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:42:52,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:52,789 INFO L225 Difference]: With dead ends: 6842 [2021-07-13 20:42:52,790 INFO L226 Difference]: Without dead ends: 6842 [2021-07-13 20:42:52,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 543.2ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:42:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6842 states. [2021-07-13 20:42:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6842 to 2474. [2021-07-13 20:42:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 3.4488475535786494) internal successors, (8529), 2473 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 8529 transitions. [2021-07-13 20:42:52,859 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 8529 transitions. Word has length 30 [2021-07-13 20:42:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:52,859 INFO L482 AbstractCegarLoop]: Abstraction has 2474 states and 8529 transitions. [2021-07-13 20:42:52,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 8529 transitions. [2021-07-13 20:42:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:52,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:52,863 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:53,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:42:53,075 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:53,075 INFO L82 PathProgramCache]: Analyzing trace with hash 103505844, now seen corresponding path program 26 times [2021-07-13 20:42:53,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:53,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793982569] [2021-07-13 20:42:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:53,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:53,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793982569] [2021-07-13 20:42:53,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793982569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:53,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210833350] [2021-07-13 20:42:53,112 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:42:53,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:53,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:53,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:53,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:53,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210833350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:53,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:53,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:53,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303910003] [2021-07-13 20:42:53,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:53,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:53,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:53,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:53,231 INFO L87 Difference]: Start difference. First operand 2474 states and 8529 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:54,003 INFO L93 Difference]: Finished difference Result 6641 states and 20706 transitions. [2021-07-13 20:42:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:42:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:54,015 INFO L225 Difference]: With dead ends: 6641 [2021-07-13 20:42:54,015 INFO L226 Difference]: Without dead ends: 6617 [2021-07-13 20:42:54,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 479.4ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:42:54,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-07-13 20:42:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2462. [2021-07-13 20:42:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.4461600975213327) internal successors, (8481), 2461 states have internal predecessors, (8481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8481 transitions. [2021-07-13 20:42:54,091 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8481 transitions. Word has length 30 [2021-07-13 20:42:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:54,091 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8481 transitions. [2021-07-13 20:42:54,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8481 transitions. [2021-07-13 20:42:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:54,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:54,095 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:54,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:54,305 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:54,305 INFO L82 PathProgramCache]: Analyzing trace with hash 954749098, now seen corresponding path program 27 times [2021-07-13 20:42:54,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:54,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782105165] [2021-07-13 20:42:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:54,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:54,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782105165] [2021-07-13 20:42:54,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782105165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:54,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055767944] [2021-07-13 20:42:54,335 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:54,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:42:54,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:42:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:54,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-13 20:42:54,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:54,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:54,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:42:54,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 20:42:54,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:54,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-07-13 20:42:54,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:54,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:54,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:42:54,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-07-13 20:42:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:54,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055767944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:54,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:54,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-07-13 20:42:54,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763417788] [2021-07-13 20:42:54,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:42:54,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:54,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:42:54,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:54,650 INFO L87 Difference]: Start difference. First operand 2462 states and 8481 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:58,814 INFO L93 Difference]: Finished difference Result 7094 states and 21992 transitions. [2021-07-13 20:42:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-07-13 20:42:58,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:58,828 INFO L225 Difference]: With dead ends: 7094 [2021-07-13 20:42:58,828 INFO L226 Difference]: Without dead ends: 7094 [2021-07-13 20:42:58,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 3298.4ms TimeCoverageRelationStatistics Valid=2804, Invalid=16656, Unknown=0, NotChecked=0, Total=19460 [2021-07-13 20:42:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7094 states. [2021-07-13 20:42:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7094 to 2546. [2021-07-13 20:42:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.4675834970530452) internal successors, (8825), 2545 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 8825 transitions. [2021-07-13 20:42:58,898 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 8825 transitions. Word has length 30 [2021-07-13 20:42:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:58,898 INFO L482 AbstractCegarLoop]: Abstraction has 2546 states and 8825 transitions. [2021-07-13 20:42:58,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 8825 transitions. [2021-07-13 20:42:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:58,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:58,902 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:59,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:59,110 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:59,110 INFO L82 PathProgramCache]: Analyzing trace with hash -52824090, now seen corresponding path program 28 times [2021-07-13 20:42:59,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:59,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862456921] [2021-07-13 20:42:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:59,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:59,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862456921] [2021-07-13 20:42:59,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862456921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:59,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543073041] [2021-07-13 20:42:59,141 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:59,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:59,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:59,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:59,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:59,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543073041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:59,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:59,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:59,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123691341] [2021-07-13 20:42:59,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:59,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:59,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:59,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:59,265 INFO L87 Difference]: Start difference. First operand 2546 states and 8825 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:00,247 INFO L93 Difference]: Finished difference Result 7653 states and 24222 transitions. [2021-07-13 20:43:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:43:00,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:43:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:00,261 INFO L225 Difference]: With dead ends: 7653 [2021-07-13 20:43:00,261 INFO L226 Difference]: Without dead ends: 7653 [2021-07-13 20:43:00,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 621.6ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:43:00,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7653 states. [2021-07-13 20:43:00,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7653 to 2551. [2021-07-13 20:43:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2550 states have (on average 3.4705882352941178) internal successors, (8850), 2550 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 8850 transitions. [2021-07-13 20:43:00,342 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 8850 transitions. Word has length 30 [2021-07-13 20:43:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:00,342 INFO L482 AbstractCegarLoop]: Abstraction has 2551 states and 8850 transitions. [2021-07-13 20:43:00,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 8850 transitions. [2021-07-13 20:43:00,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:43:00,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:00,346 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:00,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 20:43:00,547 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1172821128, now seen corresponding path program 29 times [2021-07-13 20:43:00,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:00,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613560487] [2021-07-13 20:43:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:00,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:00,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613560487] [2021-07-13 20:43:00,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613560487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:00,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431688027] [2021-07-13 20:43:00,579 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:00,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:00,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:00,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:00,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:00,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431688027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:00,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:00,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:43:00,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195074880] [2021-07-13 20:43:00,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:00,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:00,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:00,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:00,699 INFO L87 Difference]: Start difference. First operand 2551 states and 8850 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:01,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:01,564 INFO L93 Difference]: Finished difference Result 6999 states and 21972 transitions. [2021-07-13 20:43:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:43:01,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:43:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:01,576 INFO L225 Difference]: With dead ends: 6999 [2021-07-13 20:43:01,576 INFO L226 Difference]: Without dead ends: 6979 [2021-07-13 20:43:01,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 510.5ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:43:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2021-07-13 20:43:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 2561. [2021-07-13 20:43:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 3.469140625) internal successors, (8881), 2560 states have internal predecessors, (8881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 8881 transitions. [2021-07-13 20:43:01,637 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 8881 transitions. Word has length 30 [2021-07-13 20:43:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:01,637 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 8881 transitions. [2021-07-13 20:43:01,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 8881 transitions. [2021-07-13 20:43:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:43:01,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:01,641 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:01,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 20:43:01,842 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:01,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:01,842 INFO L82 PathProgramCache]: Analyzing trace with hash -902311436, now seen corresponding path program 30 times [2021-07-13 20:43:01,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:01,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224033315] [2021-07-13 20:43:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:01,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:01,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224033315] [2021-07-13 20:43:01,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224033315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:01,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477077557] [2021-07-13 20:43:01,873 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:01,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:01,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:01,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:01,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:01,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477077557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:01,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:01,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:43:01,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156261894] [2021-07-13 20:43:01,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:01,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:01,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:01,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:01,996 INFO L87 Difference]: Start difference. First operand 2561 states and 8881 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:02,846 INFO L93 Difference]: Finished difference Result 7314 states and 22731 transitions. [2021-07-13 20:43:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:43:02,847 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:43:02,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:02,860 INFO L225 Difference]: With dead ends: 7314 [2021-07-13 20:43:02,860 INFO L226 Difference]: Without dead ends: 7314 [2021-07-13 20:43:02,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:43:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7314 states. [2021-07-13 20:43:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7314 to 2550. [2021-07-13 20:43:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-07-13 20:43:02,930 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-07-13 20:43:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:02,930 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-07-13 20:43:02,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-07-13 20:43:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:43:02,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:02,935 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:03,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:43:03,144 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:03,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:03,145 INFO L82 PathProgramCache]: Analyzing trace with hash -317283250, now seen corresponding path program 31 times [2021-07-13 20:43:03,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:03,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900189576] [2021-07-13 20:43:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:03,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:03,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900189576] [2021-07-13 20:43:03,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900189576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:03,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434352274] [2021-07-13 20:43:03,176 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:03,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:03,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:03,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434352274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:03,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:03,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:43:03,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735816743] [2021-07-13 20:43:03,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:03,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:03,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:03,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:03,279 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:03,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:03,895 INFO L93 Difference]: Finished difference Result 5631 states and 17797 transitions. [2021-07-13 20:43:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:43:03,895 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:43:03,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:03,905 INFO L225 Difference]: With dead ends: 5631 [2021-07-13 20:43:03,905 INFO L226 Difference]: Without dead ends: 5583 [2021-07-13 20:43:03,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:43:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5583 states. [2021-07-13 20:43:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5583 to 2564. [2021-07-13 20:43:03,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.467811158798283) internal successors, (8888), 2563 states have internal predecessors, (8888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 8888 transitions. [2021-07-13 20:43:03,961 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 8888 transitions. Word has length 30 [2021-07-13 20:43:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:03,961 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 8888 transitions. [2021-07-13 20:43:03,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 8888 transitions. [2021-07-13 20:43:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:43:03,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:03,965 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:04,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:04,166 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:04,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1809287982, now seen corresponding path program 32 times [2021-07-13 20:43:04,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:04,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813979271] [2021-07-13 20:43:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:04,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:04,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813979271] [2021-07-13 20:43:04,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813979271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:04,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609678155] [2021-07-13 20:43:04,202 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:04,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:04,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:04,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:04,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:04,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609678155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:04,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:04,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:43:04,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475013209] [2021-07-13 20:43:04,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:04,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:04,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:04,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:04,302 INFO L87 Difference]: Start difference. First operand 2564 states and 8888 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:05,124 INFO L93 Difference]: Finished difference Result 6400 states and 19785 transitions. [2021-07-13 20:43:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:43:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:43:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:05,135 INFO L225 Difference]: With dead ends: 6400 [2021-07-13 20:43:05,135 INFO L226 Difference]: Without dead ends: 6384 [2021-07-13 20:43:05,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 512.6ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:43:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-07-13 20:43:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 2642. [2021-07-13 20:43:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 2641 states have (on average 3.452101476713366) internal successors, (9117), 2641 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:05,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 9117 transitions. [2021-07-13 20:43:05,201 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 9117 transitions. Word has length 30 [2021-07-13 20:43:05,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:05,201 INFO L482 AbstractCegarLoop]: Abstraction has 2642 states and 9117 transitions. [2021-07-13 20:43:05,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 9117 transitions. [2021-07-13 20:43:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:43:05,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:05,205 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:05,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:43:05,407 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:05,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1538778290, now seen corresponding path program 33 times [2021-07-13 20:43:05,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:05,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022052506] [2021-07-13 20:43:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:05,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:05,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022052506] [2021-07-13 20:43:05,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022052506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:05,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390634532] [2021-07-13 20:43:05,451 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:05,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:05,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:05,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:05,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:05,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390634532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:05,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:05,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:43:05,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014042424] [2021-07-13 20:43:05,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:05,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:05,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:05,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:05,565 INFO L87 Difference]: Start difference. First operand 2642 states and 9117 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:06,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:06,436 INFO L93 Difference]: Finished difference Result 6651 states and 20412 transitions. [2021-07-13 20:43:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:43:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:43:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:06,449 INFO L225 Difference]: With dead ends: 6651 [2021-07-13 20:43:06,450 INFO L226 Difference]: Without dead ends: 6651 [2021-07-13 20:43:06,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 586.8ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:43:06,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-07-13 20:43:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 2550. [2021-07-13 20:43:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-07-13 20:43:06,515 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-07-13 20:43:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:06,515 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-07-13 20:43:06,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-07-13 20:43:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:43:06,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:06,519 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:06,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:06,721 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:06,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:06,721 INFO L82 PathProgramCache]: Analyzing trace with hash 729705298, now seen corresponding path program 34 times [2021-07-13 20:43:06,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:06,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378080497] [2021-07-13 20:43:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:06,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:06,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378080497] [2021-07-13 20:43:06,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378080497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:06,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906511242] [2021-07-13 20:43:06,782 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:06,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:06,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:06,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:06,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:06,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906511242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:06,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:06,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:43:06,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487873532] [2021-07-13 20:43:06,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:06,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:06,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:06,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:06,904 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:07,712 INFO L93 Difference]: Finished difference Result 6000 states and 18681 transitions. [2021-07-13 20:43:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:43:07,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:43:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:07,723 INFO L225 Difference]: With dead ends: 6000 [2021-07-13 20:43:07,723 INFO L226 Difference]: Without dead ends: 5912 [2021-07-13 20:43:07,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:43:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2021-07-13 20:43:07,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 2568. [2021-07-13 20:43:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 3.4678613167121153) internal successors, (8902), 2567 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 8902 transitions. [2021-07-13 20:43:07,783 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 8902 transitions. Word has length 30 [2021-07-13 20:43:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:07,783 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 8902 transitions. [2021-07-13 20:43:07,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 8902 transitions. [2021-07-13 20:43:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:43:07,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:07,787 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:07,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:07,988 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:07,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1432234710, now seen corresponding path program 35 times [2021-07-13 20:43:07,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:07,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582060632] [2021-07-13 20:43:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:08,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:08,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582060632] [2021-07-13 20:43:08,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582060632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:08,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391511005] [2021-07-13 20:43:08,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:08,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:08,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:08,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:08,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:08,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391511005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:08,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:08,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:43:08,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763460319] [2021-07-13 20:43:08,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:08,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:08,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:08,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:08,123 INFO L87 Difference]: Start difference. First operand 2568 states and 8902 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:08,961 INFO L93 Difference]: Finished difference Result 6028 states and 18895 transitions. [2021-07-13 20:43:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:43:08,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:43:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:08,973 INFO L225 Difference]: With dead ends: 6028 [2021-07-13 20:43:08,973 INFO L226 Difference]: Without dead ends: 5980 [2021-07-13 20:43:08,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:43:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2021-07-13 20:43:09,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 2814. [2021-07-13 20:43:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2813 states have (on average 3.407394241023818) internal successors, (9585), 2813 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 9585 transitions. [2021-07-13 20:43:09,049 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 9585 transitions. Word has length 30 [2021-07-13 20:43:09,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:09,050 INFO L482 AbstractCegarLoop]: Abstraction has 2814 states and 9585 transitions. [2021-07-13 20:43:09,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:09,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 9585 transitions. [2021-07-13 20:43:09,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:43:09,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:09,053 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:09,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 20:43:09,254 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:09,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:09,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2092961066, now seen corresponding path program 36 times [2021-07-13 20:43:09,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:09,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498337287] [2021-07-13 20:43:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:09,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:09,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498337287] [2021-07-13 20:43:09,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498337287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:09,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952978379] [2021-07-13 20:43:09,299 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:09,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:09,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:09,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:09,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:09,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952978379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:09,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:09,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:43:09,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121760513] [2021-07-13 20:43:09,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:09,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:09,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:09,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:09,398 INFO L87 Difference]: Start difference. First operand 2814 states and 9585 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:10,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:10,392 INFO L93 Difference]: Finished difference Result 6722 states and 20709 transitions. [2021-07-13 20:43:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:43:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:43:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:10,405 INFO L225 Difference]: With dead ends: 6722 [2021-07-13 20:43:10,405 INFO L226 Difference]: Without dead ends: 6710 [2021-07-13 20:43:10,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 647.6ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:43:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2021-07-13 20:43:10,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 3090. [2021-07-13 20:43:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 3.354807381029459) internal successors, (10363), 3089 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 10363 transitions. [2021-07-13 20:43:10,478 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 10363 transitions. Word has length 30 [2021-07-13 20:43:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:10,478 INFO L482 AbstractCegarLoop]: Abstraction has 3090 states and 10363 transitions. [2021-07-13 20:43:10,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 10363 transitions. [2021-07-13 20:43:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:43:10,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:10,482 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:10,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:10,683 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:10,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1822451374, now seen corresponding path program 37 times [2021-07-13 20:43:10,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:10,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55390070] [2021-07-13 20:43:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:10,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:10,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55390070] [2021-07-13 20:43:10,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55390070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:10,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699975293] [2021-07-13 20:43:10,719 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:43:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:10,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:10,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:10,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699975293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:10,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:10,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:43:10,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664242710] [2021-07-13 20:43:10,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:10,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:10,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:10,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:10,830 INFO L87 Difference]: Start difference. First operand 3090 states and 10363 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:12,007 INFO L93 Difference]: Finished difference Result 7117 states and 21720 transitions. [2021-07-13 20:43:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:43:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:43:12,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:12,019 INFO L225 Difference]: With dead ends: 7117 [2021-07-13 20:43:12,019 INFO L226 Difference]: Without dead ends: 7117 [2021-07-13 20:43:12,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 789.9ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:43:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2021-07-13 20:43:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 2928. [2021-07-13 20:43:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 3.3850358729074137) internal successors, (9908), 2927 states have internal predecessors, (9908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 9908 transitions. [2021-07-13 20:43:12,087 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 9908 transitions. Word has length 30 [2021-07-13 20:43:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:12,088 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 9908 transitions. [2021-07-13 20:43:12,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 9908 transitions. [2021-07-13 20:43:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:12,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:12,091 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:12,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:43:12,292 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:12,292 INFO L82 PathProgramCache]: Analyzing trace with hash -605801532, now seen corresponding path program 38 times [2021-07-13 20:43:12,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:12,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283146812] [2021-07-13 20:43:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:12,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:12,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283146812] [2021-07-13 20:43:12,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283146812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:12,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932737713] [2021-07-13 20:43:12,346 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:12,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:12,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:12,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:43:12,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:12,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932737713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:12,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:12,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:43:12,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598877340] [2021-07-13 20:43:12,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:43:12,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:12,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:43:12,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:12,501 INFO L87 Difference]: Start difference. First operand 2928 states and 9908 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:13,503 INFO L93 Difference]: Finished difference Result 11499 states and 37094 transitions. [2021-07-13 20:43:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:43:13,503 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:13,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:13,525 INFO L225 Difference]: With dead ends: 11499 [2021-07-13 20:43:13,525 INFO L226 Difference]: Without dead ends: 11499 [2021-07-13 20:43:13,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 589.1ms TimeCoverageRelationStatistics Valid=922, Invalid=2984, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:43:13,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11499 states. [2021-07-13 20:43:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11499 to 3853. [2021-07-13 20:43:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3853 states, 3852 states have (on average 3.5983904465212877) internal successors, (13861), 3852 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 13861 transitions. [2021-07-13 20:43:13,649 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 13861 transitions. Word has length 32 [2021-07-13 20:43:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:13,649 INFO L482 AbstractCegarLoop]: Abstraction has 3853 states and 13861 transitions. [2021-07-13 20:43:13,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 13861 transitions. [2021-07-13 20:43:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:13,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:13,655 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:13,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:43:13,856 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:13,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1297197704, now seen corresponding path program 17 times [2021-07-13 20:43:13,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:13,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354736450] [2021-07-13 20:43:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:13,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:13,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354736450] [2021-07-13 20:43:13,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354736450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:13,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350442618] [2021-07-13 20:43:13,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:13,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:43:13,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:13,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:43:13,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:14,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350442618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:14,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:14,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:43:14,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289135468] [2021-07-13 20:43:14,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:43:14,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:14,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:43:14,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:14,053 INFO L87 Difference]: Start difference. First operand 3853 states and 13861 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:15,088 INFO L93 Difference]: Finished difference Result 11274 states and 36638 transitions. [2021-07-13 20:43:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:43:15,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:15,111 INFO L225 Difference]: With dead ends: 11274 [2021-07-13 20:43:15,111 INFO L226 Difference]: Without dead ends: 11274 [2021-07-13 20:43:15,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=918, Invalid=3114, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:43:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11274 states. [2021-07-13 20:43:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11274 to 3659. [2021-07-13 20:43:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-07-13 20:43:15,236 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-07-13 20:43:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:15,236 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-07-13 20:43:15,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-07-13 20:43:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:15,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:15,241 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:15,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:15,442 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:15,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:15,442 INFO L82 PathProgramCache]: Analyzing trace with hash 600098510, now seen corresponding path program 39 times [2021-07-13 20:43:15,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:15,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449254751] [2021-07-13 20:43:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:15,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:15,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449254751] [2021-07-13 20:43:15,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449254751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:15,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441221771] [2021-07-13 20:43:15,475 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:43:15,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:43:15,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:15,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:43:15,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:15,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441221771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:15,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:15,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:43:15,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383716819] [2021-07-13 20:43:15,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:15,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:15,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:15,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:15,597 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:16,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:16,081 INFO L93 Difference]: Finished difference Result 9494 states and 30497 transitions. [2021-07-13 20:43:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:43:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:16,099 INFO L225 Difference]: With dead ends: 9494 [2021-07-13 20:43:16,099 INFO L226 Difference]: Without dead ends: 9486 [2021-07-13 20:43:16,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:43:16,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9486 states. [2021-07-13 20:43:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9486 to 3671. [2021-07-13 20:43:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 3.5498637602179834) internal successors, (13028), 3670 states have internal predecessors, (13028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 13028 transitions. [2021-07-13 20:43:16,232 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 13028 transitions. Word has length 32 [2021-07-13 20:43:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:16,232 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 13028 transitions. [2021-07-13 20:43:16,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 13028 transitions. [2021-07-13 20:43:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:16,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:16,238 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:16,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:43:16,438 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:16,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:16,438 INFO L82 PathProgramCache]: Analyzing trace with hash 870608202, now seen corresponding path program 40 times [2021-07-13 20:43:16,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:16,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656720634] [2021-07-13 20:43:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:16,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:16,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656720634] [2021-07-13 20:43:16,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656720634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:16,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422657627] [2021-07-13 20:43:16,475 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:16,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:16,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:16,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:43:16,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:16,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422657627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:16,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:16,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:43:16,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411996529] [2021-07-13 20:43:16,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:16,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:16,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:16,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:16,618 INFO L87 Difference]: Start difference. First operand 3671 states and 13028 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:17,267 INFO L93 Difference]: Finished difference Result 10005 states and 31855 transitions. [2021-07-13 20:43:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:43:17,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:17,286 INFO L225 Difference]: With dead ends: 10005 [2021-07-13 20:43:17,286 INFO L226 Difference]: Without dead ends: 10005 [2021-07-13 20:43:17,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:43:17,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10005 states. [2021-07-13 20:43:17,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10005 to 3659. [2021-07-13 20:43:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-07-13 20:43:17,408 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-07-13 20:43:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:17,408 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-07-13 20:43:17,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-07-13 20:43:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:17,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:17,414 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:17,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:17,614 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:17,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:17,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2007937660, now seen corresponding path program 18 times [2021-07-13 20:43:17,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:17,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070375674] [2021-07-13 20:43:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:17,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:17,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070375674] [2021-07-13 20:43:17,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070375674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:17,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034645913] [2021-07-13 20:43:17,653 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:17,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:43:17,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:17,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:17,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:17,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034645913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:17,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:17,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-13 20:43:17,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666860231] [2021-07-13 20:43:17,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:17,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:17,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:17,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:17,791 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:19,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:19,535 INFO L93 Difference]: Finished difference Result 10824 states and 34873 transitions. [2021-07-13 20:43:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-13 20:43:19,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:19,559 INFO L225 Difference]: With dead ends: 10824 [2021-07-13 20:43:19,559 INFO L226 Difference]: Without dead ends: 10824 [2021-07-13 20:43:19,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1067.9ms TimeCoverageRelationStatistics Valid=1649, Invalid=7281, Unknown=0, NotChecked=0, Total=8930 [2021-07-13 20:43:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10824 states. [2021-07-13 20:43:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10824 to 4026. [2021-07-13 20:43:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.570683229813665) internal successors, (14372), 4025 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 14372 transitions. [2021-07-13 20:43:19,676 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 14372 transitions. Word has length 32 [2021-07-13 20:43:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:19,677 INFO L482 AbstractCegarLoop]: Abstraction has 4026 states and 14372 transitions. [2021-07-13 20:43:19,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 14372 transitions. [2021-07-13 20:43:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:19,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:19,682 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:19,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:43:19,885 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:19,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:19,885 INFO L82 PathProgramCache]: Analyzing trace with hash -383319252, now seen corresponding path program 41 times [2021-07-13 20:43:19,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:19,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733441552] [2021-07-13 20:43:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:19,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:19,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733441552] [2021-07-13 20:43:19,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733441552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:19,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752920824] [2021-07-13 20:43:19,923 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:19,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:43:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:19,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:43:20,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752920824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:20,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:20,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:43:20,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032970657] [2021-07-13 20:43:20,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:43:20,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:20,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:43:20,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:43:20,062 INFO L87 Difference]: Start difference. First operand 4026 states and 14372 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:22,024 INFO L93 Difference]: Finished difference Result 11450 states and 37158 transitions. [2021-07-13 20:43:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-13 20:43:22,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:22,046 INFO L225 Difference]: With dead ends: 11450 [2021-07-13 20:43:22,046 INFO L226 Difference]: Without dead ends: 11402 [2021-07-13 20:43:22,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4651 ImplicationChecksByTransitivity, 1271.0ms TimeCoverageRelationStatistics Valid=2133, Invalid=10299, Unknown=0, NotChecked=0, Total=12432 [2021-07-13 20:43:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-07-13 20:43:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 4295. [2021-07-13 20:43:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4294 states have (on average 3.6313460642757334) internal successors, (15593), 4294 states have internal predecessors, (15593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 15593 transitions. [2021-07-13 20:43:22,189 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 15593 transitions. Word has length 32 [2021-07-13 20:43:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:22,189 INFO L482 AbstractCegarLoop]: Abstraction has 4295 states and 15593 transitions. [2021-07-13 20:43:22,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:22,189 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 15593 transitions. [2021-07-13 20:43:22,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:22,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:22,196 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:22,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:22,397 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash 717122884, now seen corresponding path program 19 times [2021-07-13 20:43:22,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:22,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938858195] [2021-07-13 20:43:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:22,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:22,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938858195] [2021-07-13 20:43:22,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938858195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:22,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768453612] [2021-07-13 20:43:22,439 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:22,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:43:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:22,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768453612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:22,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:22,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:43:22,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762073408] [2021-07-13 20:43:22,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:43:22,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:22,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:43:22,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:43:22,587 INFO L87 Difference]: Start difference. First operand 4295 states and 15593 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:23,433 INFO L93 Difference]: Finished difference Result 11886 states and 38735 transitions. [2021-07-13 20:43:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:43:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:23,459 INFO L225 Difference]: With dead ends: 11886 [2021-07-13 20:43:23,459 INFO L226 Difference]: Without dead ends: 11886 [2021-07-13 20:43:23,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 522.5ms TimeCoverageRelationStatistics Valid=740, Invalid=2016, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:43:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2021-07-13 20:43:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 4493. [2021-07-13 20:43:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 4492 states have (on average 3.610418521816563) internal successors, (16218), 4492 states have internal predecessors, (16218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 16218 transitions. [2021-07-13 20:43:23,615 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 16218 transitions. Word has length 32 [2021-07-13 20:43:23,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:23,615 INFO L482 AbstractCegarLoop]: Abstraction has 4493 states and 16218 transitions. [2021-07-13 20:43:23,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:23,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 16218 transitions. [2021-07-13 20:43:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:23,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:23,621 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:23,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 20:43:23,822 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash -338254510, now seen corresponding path program 20 times [2021-07-13 20:43:23,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:23,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728386610] [2021-07-13 20:43:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:23,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:23,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728386610] [2021-07-13 20:43:23,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728386610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:23,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132784417] [2021-07-13 20:43:23,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:23,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:23,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:23,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132784417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:23,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:23,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:43:23,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841255050] [2021-07-13 20:43:23,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:43:23,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:23,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:43:23,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:43:23,998 INFO L87 Difference]: Start difference. First operand 4493 states and 16218 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:25,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:25,552 INFO L93 Difference]: Finished difference Result 12030 states and 39107 transitions. [2021-07-13 20:43:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-13 20:43:25,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:25,577 INFO L225 Difference]: With dead ends: 12030 [2021-07-13 20:43:25,577 INFO L226 Difference]: Without dead ends: 12026 [2021-07-13 20:43:25,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 951.3ms TimeCoverageRelationStatistics Valid=1618, Invalid=7124, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:43:25,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2021-07-13 20:43:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 4522. [2021-07-13 20:43:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 3.6051758460517584) internal successors, (16299), 4521 states have internal predecessors, (16299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 16299 transitions. [2021-07-13 20:43:25,727 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 16299 transitions. Word has length 32 [2021-07-13 20:43:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:25,727 INFO L482 AbstractCegarLoop]: Abstraction has 4522 states and 16299 transitions. [2021-07-13 20:43:25,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 16299 transitions. [2021-07-13 20:43:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:25,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:25,734 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:25,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:25,944 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash 956690446, now seen corresponding path program 21 times [2021-07-13 20:43:25,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:25,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777635769] [2021-07-13 20:43:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:25,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:25,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777635769] [2021-07-13 20:43:25,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777635769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:25,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555108355] [2021-07-13 20:43:25,981 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:26,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:43:26,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:26,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:43:26,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:26,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555108355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:26,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:26,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 20:43:26,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926701207] [2021-07-13 20:43:26,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:26,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:26,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:26,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:26,116 INFO L87 Difference]: Start difference. First operand 4522 states and 16299 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:27,254 INFO L93 Difference]: Finished difference Result 11020 states and 36349 transitions. [2021-07-13 20:43:27,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:43:27,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:27,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:27,278 INFO L225 Difference]: With dead ends: 11020 [2021-07-13 20:43:27,279 INFO L226 Difference]: Without dead ends: 10988 [2021-07-13 20:43:27,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 694.9ms TimeCoverageRelationStatistics Valid=1165, Invalid=4237, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:43:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10988 states. [2021-07-13 20:43:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10988 to 4521. [2021-07-13 20:43:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4520 states have (on average 3.604424778761062) internal successors, (16292), 4520 states have internal predecessors, (16292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 16292 transitions. [2021-07-13 20:43:27,421 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 16292 transitions. Word has length 32 [2021-07-13 20:43:27,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:27,421 INFO L482 AbstractCegarLoop]: Abstraction has 4521 states and 16292 transitions. [2021-07-13 20:43:27,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:27,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 16292 transitions. [2021-07-13 20:43:27,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:27,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:27,428 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:27,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:43:27,629 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:27,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:27,629 INFO L82 PathProgramCache]: Analyzing trace with hash 313112068, now seen corresponding path program 42 times [2021-07-13 20:43:27,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:27,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474805988] [2021-07-13 20:43:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:28,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:28,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474805988] [2021-07-13 20:43:28,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474805988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:28,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55594865] [2021-07-13 20:43:28,039 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:28,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:28,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:43:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:28,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:43:28,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:28,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:28,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:28,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-07-13 20:43:28,222 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:43:28,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:43:28,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:28,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:28,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:28,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-07-13 20:43:28,298 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-07-13 20:43:28,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:43:28,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:28,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:28,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:28,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-07-13 20:43:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:28,480 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-07-13 20:43:28,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:43:28,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:28,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:28,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:28,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:57 [2021-07-13 20:43:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:28,682 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-07-13 20:43:28,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:43:28,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:28,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:28,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:28,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:64, output treesize:63 [2021-07-13 20:43:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:28,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55594865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:28,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:28,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-13 20:43:28,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220718882] [2021-07-13 20:43:28,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:43:28,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:28,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:43:28,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:43:28,853 INFO L87 Difference]: Start difference. First operand 4521 states and 16292 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:29,368 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-07-13 20:43:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:31,463 INFO L93 Difference]: Finished difference Result 6435 states and 22058 transitions. [2021-07-13 20:43:31,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:43:31,463 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:31,476 INFO L225 Difference]: With dead ends: 6435 [2021-07-13 20:43:31,476 INFO L226 Difference]: Without dead ends: 6256 [2021-07-13 20:43:31,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 2411.9ms TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:43:31,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-07-13 20:43:31,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 4629. [2021-07-13 20:43:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 3.6028522039757993) internal successors, (16674), 4628 states have internal predecessors, (16674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 16674 transitions. [2021-07-13 20:43:31,563 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 16674 transitions. Word has length 32 [2021-07-13 20:43:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:31,563 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 16674 transitions. [2021-07-13 20:43:31,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 16674 transitions. [2021-07-13 20:43:31,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:31,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:31,570 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:31,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:31,785 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:31,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:31,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2029292164, now seen corresponding path program 43 times [2021-07-13 20:43:31,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:31,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218469507] [2021-07-13 20:43:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:32,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:32,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218469507] [2021-07-13 20:43:32,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218469507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:32,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635227733] [2021-07-13 20:43:32,169 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:32,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:43:32,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:32,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:43:32,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:32,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:32,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:43:32,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-07-13 20:43:32,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:43:32,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:32,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:32,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:43:32,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-07-13 20:43:32,385 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-13 20:43:32,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:43:32,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:32,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:32,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:32,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-07-13 20:43:32,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:32,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:32,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-07-13 20:43:32,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:32,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:32,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:32,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:42 [2021-07-13 20:43:32,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:32,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:32,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-07-13 20:43:32,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:32,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:32,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:32,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:39 [2021-07-13 20:43:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:32,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635227733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:32,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:32,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-07-13 20:43:32,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412934806] [2021-07-13 20:43:32,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:43:32,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:32,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:43:32,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:43:32,699 INFO L87 Difference]: Start difference. First operand 4629 states and 16674 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:34,312 INFO L93 Difference]: Finished difference Result 6469 states and 22175 transitions. [2021-07-13 20:43:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:43:34,312 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:34,324 INFO L225 Difference]: With dead ends: 6469 [2021-07-13 20:43:34,324 INFO L226 Difference]: Without dead ends: 6146 [2021-07-13 20:43:34,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1580.9ms TimeCoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:43:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6146 states. [2021-07-13 20:43:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6146 to 4719. [2021-07-13 20:43:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 4718 states have (on average 3.5938957185247986) internal successors, (16956), 4718 states have internal predecessors, (16956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16956 transitions. [2021-07-13 20:43:34,407 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16956 transitions. Word has length 32 [2021-07-13 20:43:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:34,407 INFO L482 AbstractCegarLoop]: Abstraction has 4719 states and 16956 transitions. [2021-07-13 20:43:34,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16956 transitions. [2021-07-13 20:43:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:34,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:34,415 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:34,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:43:34,615 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:34,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash -500654400, now seen corresponding path program 44 times [2021-07-13 20:43:34,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:34,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594553591] [2021-07-13 20:43:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:34,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:34,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594553591] [2021-07-13 20:43:34,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594553591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:34,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655758629] [2021-07-13 20:43:34,970 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:34,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:34,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:43:34,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:35,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-13 20:43:35,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:35,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:35,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:43:35,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-13 20:43:35,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:35,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-07-13 20:43:35,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:35,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:35,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:43:35,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-07-13 20:43:35,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:35,192 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-07-13 20:43:35,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-07-13 20:43:35,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:35,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:35,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:35,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-07-13 20:43:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:35,298 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-07-13 20:43:35,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-07-13 20:43:35,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:35,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:35,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:35,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:53 [2021-07-13 20:43:35,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:35,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:35,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:35,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:35,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2021-07-13 20:43:35,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:35,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:35,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:35,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:48 [2021-07-13 20:43:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:35,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655758629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:35,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:35,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-13 20:43:35,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083378909] [2021-07-13 20:43:35,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:43:35,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:35,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:43:35,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:43:35,572 INFO L87 Difference]: Start difference. First operand 4719 states and 16956 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:35,941 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-07-13 20:43:37,061 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-07-13 20:43:38,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:38,194 INFO L93 Difference]: Finished difference Result 7571 states and 25578 transitions. [2021-07-13 20:43:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:43:38,194 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:38,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:38,208 INFO L225 Difference]: With dead ends: 7571 [2021-07-13 20:43:38,208 INFO L226 Difference]: Without dead ends: 7144 [2021-07-13 20:43:38,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2475.9ms TimeCoverageRelationStatistics Valid=604, Invalid=2936, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:43:38,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-07-13 20:43:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 4997. [2021-07-13 20:43:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4997 states, 4996 states have (on average 3.5712570056044837) internal successors, (17842), 4996 states have internal predecessors, (17842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 17842 transitions. [2021-07-13 20:43:38,296 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 17842 transitions. Word has length 32 [2021-07-13 20:43:38,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:38,296 INFO L482 AbstractCegarLoop]: Abstraction has 4997 states and 17842 transitions. [2021-07-13 20:43:38,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:38,296 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 17842 transitions. [2021-07-13 20:43:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:38,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:38,303 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:38,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:43:38,504 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:38,504 INFO L82 PathProgramCache]: Analyzing trace with hash 457173692, now seen corresponding path program 45 times [2021-07-13 20:43:38,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:38,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602359513] [2021-07-13 20:43:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:39,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:39,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602359513] [2021-07-13 20:43:39,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602359513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:39,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138586004] [2021-07-13 20:43:39,008 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:39,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:43:39,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:39,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:43:39,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:39,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:43:39,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:39,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:39,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:39,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:33 [2021-07-13 20:43:39,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:39,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:43:39,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:39,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:39,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:39,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:40 [2021-07-13 20:43:39,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:39,300 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-13 20:43:39,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:43:39,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:39,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:39,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:39,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:52 [2021-07-13 20:43:39,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:39,450 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-07-13 20:43:39,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:43:39,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:39,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:39,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:39,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:67 [2021-07-13 20:43:39,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:39,738 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-07-13 20:43:39,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 48 [2021-07-13 20:43:39,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:39,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:39,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:39,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:75 [2021-07-13 20:43:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:40,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138586004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:40,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:40,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:43:40,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304659028] [2021-07-13 20:43:40,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:43:40,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:40,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:43:40,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:43:40,183 INFO L87 Difference]: Start difference. First operand 4997 states and 17842 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:40,963 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-07-13 20:43:41,117 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-07-13 20:43:41,556 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-07-13 20:43:42,618 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-07-13 20:43:43,096 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-07-13 20:43:43,608 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-07-13 20:43:43,804 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-07-13 20:43:44,131 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-07-13 20:43:44,621 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2021-07-13 20:43:44,926 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-07-13 20:43:45,089 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-07-13 20:43:46,062 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2021-07-13 20:43:46,543 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2021-07-13 20:43:47,049 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2021-07-13 20:43:49,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:49,575 INFO L93 Difference]: Finished difference Result 7614 states and 26316 transitions. [2021-07-13 20:43:49,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:43:49,576 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:49,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:49,592 INFO L225 Difference]: With dead ends: 7614 [2021-07-13 20:43:49,592 INFO L226 Difference]: Without dead ends: 7468 [2021-07-13 20:43:49,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 6043.2ms TimeCoverageRelationStatistics Valid=951, Invalid=5369, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:43:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2021-07-13 20:43:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 5655. [2021-07-13 20:43:49,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5655 states, 5654 states have (on average 3.5951538733639903) internal successors, (20327), 5654 states have internal predecessors, (20327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5655 states to 5655 states and 20327 transitions. [2021-07-13 20:43:49,706 INFO L78 Accepts]: Start accepts. Automaton has 5655 states and 20327 transitions. Word has length 32 [2021-07-13 20:43:49,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:49,706 INFO L482 AbstractCegarLoop]: Abstraction has 5655 states and 20327 transitions. [2021-07-13 20:43:49,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:49,706 INFO L276 IsEmpty]: Start isEmpty. Operand 5655 states and 20327 transitions. [2021-07-13 20:43:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:49,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:49,714 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:49,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:43:49,915 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:49,915 INFO L82 PathProgramCache]: Analyzing trace with hash 737661248, now seen corresponding path program 46 times [2021-07-13 20:43:49,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:49,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222298387] [2021-07-13 20:43:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:50,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:50,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222298387] [2021-07-13 20:43:50,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222298387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:50,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478578957] [2021-07-13 20:43:50,309 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:50,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:50,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:50,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:43:50,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:50,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-13 20:43:50,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:50,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-07-13 20:43:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-07-13 20:43:50,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:50,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-07-13 20:43:50,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,589 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-07-13 20:43:50,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-07-13 20:43:50,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:50,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:50,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:48 [2021-07-13 20:43:50,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,661 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-07-13 20:43:50,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-07-13 20:43:50,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:50,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:50,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:48 [2021-07-13 20:43:50,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,763 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-07-13 20:43:50,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-07-13 20:43:50,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:50,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:50,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-07-13 20:43:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:51,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478578957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:51,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:51,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:43:51,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630599860] [2021-07-13 20:43:51,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:43:51,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:51,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:43:51,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:43:51,019 INFO L87 Difference]: Start difference. First operand 5655 states and 20327 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:56,185 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2021-07-13 20:43:56,379 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2021-07-13 20:43:56,912 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-07-13 20:43:57,099 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2021-07-13 20:43:57,309 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-07-13 20:43:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:57,393 INFO L93 Difference]: Finished difference Result 9721 states and 32858 transitions. [2021-07-13 20:43:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:43:57,393 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:43:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:57,413 INFO L225 Difference]: With dead ends: 9721 [2021-07-13 20:43:57,413 INFO L226 Difference]: Without dead ends: 9341 [2021-07-13 20:43:57,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 5017.1ms TimeCoverageRelationStatistics Valid=1229, Invalid=6253, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:43:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-07-13 20:43:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 5540. [2021-07-13 20:43:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 5539 states have (on average 3.6270084852861526) internal successors, (20090), 5539 states have internal predecessors, (20090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 20090 transitions. [2021-07-13 20:43:57,528 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 20090 transitions. Word has length 32 [2021-07-13 20:43:57,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:57,528 INFO L482 AbstractCegarLoop]: Abstraction has 5540 states and 20090 transitions. [2021-07-13 20:43:57,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 20090 transitions. [2021-07-13 20:43:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:43:57,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:57,536 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:57,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:57,737 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:57,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2125295156, now seen corresponding path program 47 times [2021-07-13 20:43:57,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:57,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097638352] [2021-07-13 20:43:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:58,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:58,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097638352] [2021-07-13 20:43:58,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097638352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:58,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339065729] [2021-07-13 20:43:58,125 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:58,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:43:58,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:58,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:43:58,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:58,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:43:58,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:58,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:58,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:43:58,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-07-13 20:43:58,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:43:58,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:58,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:58,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:43:58,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-07-13 20:43:58,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:43:58,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:58,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:58,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:43:58,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:27 [2021-07-13 20:43:58,397 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-13 20:43:58,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:43:58,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:58,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:58,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:58,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-07-13 20:43:58,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:58,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:58,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:58,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-07-13 20:43:58,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:58,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:58,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:43:58,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:41 [2021-07-13 20:43:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:58,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339065729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:58,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:58,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:43:58,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315652517] [2021-07-13 20:43:58,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:43:58,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:58,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:43:58,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:43:58,638 INFO L87 Difference]: Start difference. First operand 5540 states and 20090 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:00,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:00,434 INFO L93 Difference]: Finished difference Result 8803 states and 30962 transitions. [2021-07-13 20:44:00,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:44:00,434 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:44:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:00,452 INFO L225 Difference]: With dead ends: 8803 [2021-07-13 20:44:00,452 INFO L226 Difference]: Without dead ends: 8465 [2021-07-13 20:44:00,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1629.5ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:44:00,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8465 states. [2021-07-13 20:44:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8465 to 6862. [2021-07-13 20:44:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6862 states, 6861 states have (on average 3.6003498032356798) internal successors, (24702), 6861 states have internal predecessors, (24702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 24702 transitions. [2021-07-13 20:44:00,568 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 24702 transitions. Word has length 32 [2021-07-13 20:44:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:00,568 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 24702 transitions. [2021-07-13 20:44:00,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 24702 transitions. [2021-07-13 20:44:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:44:00,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:00,580 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:00,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:44:00,789 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash -787029172, now seen corresponding path program 48 times [2021-07-13 20:44:00,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:00,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011669626] [2021-07-13 20:44:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:01,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011669626] [2021-07-13 20:44:01,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011669626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010497453] [2021-07-13 20:44:01,218 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:01,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:44:01,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:44:01,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:01,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:44:01,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:01,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:01,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:01,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-07-13 20:44:01,413 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:44:01,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:44:01,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:01,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:01,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:01,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-07-13 20:44:01,521 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-07-13 20:44:01,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:44:01,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:01,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:01,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:01,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-07-13 20:44:01,622 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-07-13 20:44:01,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:44:01,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:01,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:01,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:01,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:63 [2021-07-13 20:44:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:01,807 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-07-13 20:44:01,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:44:01,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:01,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:01,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:01,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-07-13 20:44:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:01,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010497453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:01,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:01,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-13 20:44:01,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904453281] [2021-07-13 20:44:01,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:44:01,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:01,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:44:01,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:44:01,949 INFO L87 Difference]: Start difference. First operand 6862 states and 24702 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:06,482 INFO L93 Difference]: Finished difference Result 10382 states and 35158 transitions. [2021-07-13 20:44:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:44:06,483 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:44:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:06,502 INFO L225 Difference]: With dead ends: 10382 [2021-07-13 20:44:06,502 INFO L226 Difference]: Without dead ends: 10079 [2021-07-13 20:44:06,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 3617.2ms TimeCoverageRelationStatistics Valid=964, Invalid=6518, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:44:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10079 states. [2021-07-13 20:44:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10079 to 7386. [2021-07-13 20:44:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7386 states, 7385 states have (on average 3.6106973595125256) internal successors, (26665), 7385 states have internal predecessors, (26665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7386 states to 7386 states and 26665 transitions. [2021-07-13 20:44:06,634 INFO L78 Accepts]: Start accepts. Automaton has 7386 states and 26665 transitions. Word has length 32 [2021-07-13 20:44:06,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:06,634 INFO L482 AbstractCegarLoop]: Abstraction has 7386 states and 26665 transitions. [2021-07-13 20:44:06,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7386 states and 26665 transitions. [2021-07-13 20:44:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:44:06,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:06,647 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:06,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:06,847 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:06,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:06,847 INFO L82 PathProgramCache]: Analyzing trace with hash -700345780, now seen corresponding path program 49 times [2021-07-13 20:44:06,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:06,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150358104] [2021-07-13 20:44:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:07,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:07,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150358104] [2021-07-13 20:44:07,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150358104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:07,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146839731] [2021-07-13 20:44:07,202 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:07,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:44:07,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:07,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:44:07,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:07,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:07,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:07,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-13 20:44:07,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:07,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:44:07,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:07,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:07,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:07,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-07-13 20:44:07,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:07,447 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-13 20:44:07,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:44:07,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:07,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:07,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:07,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-07-13 20:44:07,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:07,548 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-07-13 20:44:07,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:44:07,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:07,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:07,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:07,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:61 [2021-07-13 20:44:07,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:07,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:07,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:07,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:07,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:07,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:07,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:07,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-07-13 20:44:07,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:07,855 INFO L628 ElimStorePlain]: treesize reduction 7, result has 88.9 percent of original size [2021-07-13 20:44:07,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:07,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:71, output treesize:51 [2021-07-13 20:44:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:08,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146839731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:08,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:08,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-07-13 20:44:08,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875376921] [2021-07-13 20:44:08,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:44:08,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:08,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:44:08,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:44:08,023 INFO L87 Difference]: Start difference. First operand 7386 states and 26665 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:10,292 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-07-13 20:44:11,837 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-07-13 20:44:16,121 WARN L205 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-07-13 20:44:19,150 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-07-13 20:44:20,362 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-07-13 20:44:22,874 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-07-13 20:44:24,027 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-07-13 20:44:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:25,310 INFO L93 Difference]: Finished difference Result 13949 states and 48004 transitions. [2021-07-13 20:44:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:44:25,310 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:44:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:25,338 INFO L225 Difference]: With dead ends: 13949 [2021-07-13 20:44:25,338 INFO L226 Difference]: Without dead ends: 12941 [2021-07-13 20:44:25,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 10811.0ms TimeCoverageRelationStatistics Valid=957, Invalid=4445, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:44:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12941 states. [2021-07-13 20:44:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12941 to 9690. [2021-07-13 20:44:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 3.617297966766436) internal successors, (35048), 9689 states have internal predecessors, (35048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 35048 transitions. [2021-07-13 20:44:25,515 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 35048 transitions. Word has length 32 [2021-07-13 20:44:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:25,515 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 35048 transitions. [2021-07-13 20:44:25,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 35048 transitions. [2021-07-13 20:44:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:44:25,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:25,530 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:25,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-13 20:44:25,731 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:25,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:25,731 INFO L82 PathProgramCache]: Analyzing trace with hash -643597936, now seen corresponding path program 50 times [2021-07-13 20:44:25,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:25,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078549249] [2021-07-13 20:44:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:26,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:26,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078549249] [2021-07-13 20:44:26,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078549249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:26,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038128067] [2021-07-13 20:44:26,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:26,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:26,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:26,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:44:26,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:26,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:44:26,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:26,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:26,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:26,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 20:44:26,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:44:26,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:26,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:26,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:26,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-07-13 20:44:26,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:44:26,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:26,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:26,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:26,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-07-13 20:44:26,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:44:26,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:26,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:26,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:26,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-07-13 20:44:26,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:26,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:26,491 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:44:26,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:44:26,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:26,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:26,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:26,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-07-13 20:44:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:26,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038128067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:26,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:26,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:44:26,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788600437] [2021-07-13 20:44:26,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:44:26,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:26,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:44:26,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:44:26,679 INFO L87 Difference]: Start difference. First operand 9690 states and 35048 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:27,685 INFO L93 Difference]: Finished difference Result 10881 states and 38680 transitions. [2021-07-13 20:44:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:44:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:44:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:27,708 INFO L225 Difference]: With dead ends: 10881 [2021-07-13 20:44:27,708 INFO L226 Difference]: Without dead ends: 10561 [2021-07-13 20:44:27,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1201.9ms TimeCoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:44:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-07-13 20:44:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 9690. [2021-07-13 20:44:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 3.6100732789761585) internal successors, (34978), 9689 states have internal predecessors, (34978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 34978 transitions. [2021-07-13 20:44:27,883 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 34978 transitions. Word has length 32 [2021-07-13 20:44:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:27,884 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 34978 transitions. [2021-07-13 20:44:27,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 34978 transitions. [2021-07-13 20:44:27,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:44:27,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:27,900 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:28,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:28,101 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash 42131912, now seen corresponding path program 51 times [2021-07-13 20:44:28,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:28,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089620109] [2021-07-13 20:44:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:28,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:28,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089620109] [2021-07-13 20:44:28,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089620109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:28,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912185742] [2021-07-13 20:44:28,544 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:28,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:44:28,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:28,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:44:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:28,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-13 20:44:28,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:28,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:28,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:28,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-07-13 20:44:28,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:28,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-07-13 20:44:28,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:28,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:28,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:28,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-07-13 20:44:28,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:44:28,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:28,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:28,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:28,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:24 [2021-07-13 20:44:28,769 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-13 20:44:28,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:44:28,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:28,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:28,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:28,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-07-13 20:44:28,838 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-07-13 20:44:28,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:44:28,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:28,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:28,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:28,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:43 [2021-07-13 20:44:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:28,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912185742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:28,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:28,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-07-13 20:44:28,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820669546] [2021-07-13 20:44:28,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:44:28,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:28,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:44:28,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:44:28,939 INFO L87 Difference]: Start difference. First operand 9690 states and 34978 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:30,008 INFO L93 Difference]: Finished difference Result 13901 states and 49107 transitions. [2021-07-13 20:44:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:44:30,008 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:44:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:30,037 INFO L225 Difference]: With dead ends: 13901 [2021-07-13 20:44:30,038 INFO L226 Difference]: Without dead ends: 13475 [2021-07-13 20:44:30,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 942.9ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:44:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13475 states. [2021-07-13 20:44:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13475 to 8431. [2021-07-13 20:44:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.5896797153024913) internal successors, (30261), 8430 states have internal predecessors, (30261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 30261 transitions. [2021-07-13 20:44:30,198 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 30261 transitions. Word has length 32 [2021-07-13 20:44:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:30,198 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 30261 transitions. [2021-07-13 20:44:30,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 30261 transitions. [2021-07-13 20:44:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:44:30,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:30,211 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:30,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:30,417 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1250586420, now seen corresponding path program 52 times [2021-07-13 20:44:30,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:30,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018690099] [2021-07-13 20:44:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:30,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:30,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018690099] [2021-07-13 20:44:30,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018690099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:30,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357536037] [2021-07-13 20:44:30,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:30,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:30,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:30,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:44:30,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:30,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-13 20:44:30,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:30,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 20:44:30,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:44:30,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:30,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-13 20:44:30,980 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-13 20:44:30,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:44:30,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:30,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:30,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:44 [2021-07-13 20:44:31,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:31,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:31,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:31,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-07-13 20:44:31,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:31,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:31,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:31,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:34 [2021-07-13 20:44:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:31,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357536037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:31,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:31,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-13 20:44:31,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589241212] [2021-07-13 20:44:31,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:44:31,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:31,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:44:31,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:44:31,142 INFO L87 Difference]: Start difference. First operand 8431 states and 30261 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:31,892 INFO L93 Difference]: Finished difference Result 10312 states and 36179 transitions. [2021-07-13 20:44:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:44:31,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:44:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:31,913 INFO L225 Difference]: With dead ends: 10312 [2021-07-13 20:44:31,914 INFO L226 Difference]: Without dead ends: 10002 [2021-07-13 20:44:31,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 809.0ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:44:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10002 states. [2021-07-13 20:44:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10002 to 8831. [2021-07-13 20:44:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8831 states, 8830 states have (on average 3.5691959229898074) internal successors, (31516), 8830 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 31516 transitions. [2021-07-13 20:44:32,061 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 31516 transitions. Word has length 32 [2021-07-13 20:44:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:32,061 INFO L482 AbstractCegarLoop]: Abstraction has 8831 states and 31516 transitions. [2021-07-13 20:44:32,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 31516 transitions. [2021-07-13 20:44:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:44:32,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:32,075 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:32,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:32,276 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:32,276 INFO L82 PathProgramCache]: Analyzing trace with hash -564856572, now seen corresponding path program 53 times [2021-07-13 20:44:32,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:32,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074297998] [2021-07-13 20:44:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:32,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:32,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074297998] [2021-07-13 20:44:32,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074297998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:32,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418285172] [2021-07-13 20:44:32,623 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:32,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:44:32,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:32,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:44:32,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:32,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:44:32,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:32,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:32,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:32,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-07-13 20:44:32,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:44:32,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:32,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:32,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:32,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-07-13 20:44:32,804 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-07-13 20:44:32,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:44:32,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:32,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:32,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:32,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-07-13 20:44:32,945 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-07-13 20:44:32,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:44:32,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:32,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:32,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:32,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-07-13 20:44:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:33,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418285172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:33,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:33,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-07-13 20:44:33,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836802223] [2021-07-13 20:44:33,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:44:33,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:44:33,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:44:33,138 INFO L87 Difference]: Start difference. First operand 8831 states and 31516 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:34,910 INFO L93 Difference]: Finished difference Result 16437 states and 56867 transitions. [2021-07-13 20:44:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:44:34,911 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:44:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:34,944 INFO L225 Difference]: With dead ends: 16437 [2021-07-13 20:44:34,944 INFO L226 Difference]: Without dead ends: 15835 [2021-07-13 20:44:34,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1324.1ms TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:44:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15835 states. [2021-07-13 20:44:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15835 to 8581. [2021-07-13 20:44:35,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 8580 states have (on average 3.5440559440559443) internal successors, (30408), 8580 states have internal predecessors, (30408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 30408 transitions. [2021-07-13 20:44:35,120 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 30408 transitions. Word has length 32 [2021-07-13 20:44:35,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:35,120 INFO L482 AbstractCegarLoop]: Abstraction has 8581 states and 30408 transitions. [2021-07-13 20:44:35,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:35,120 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 30408 transitions. [2021-07-13 20:44:35,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:44:35,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:35,134 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:35,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 20:44:35,334 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:35,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1781126392, now seen corresponding path program 54 times [2021-07-13 20:44:35,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:35,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882436228] [2021-07-13 20:44:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:35,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:35,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882436228] [2021-07-13 20:44:35,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882436228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:35,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963456336] [2021-07-13 20:44:35,414 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:35,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:44:35,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:35,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:44:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:44:35,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963456336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:35,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:35,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-07-13 20:44:35,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13898344] [2021-07-13 20:44:35,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:44:35,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:35,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:44:35,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:44:35,598 INFO L87 Difference]: Start difference. First operand 8581 states and 30408 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:38,673 INFO L93 Difference]: Finished difference Result 24214 states and 79256 transitions. [2021-07-13 20:44:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-07-13 20:44:38,673 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:44:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:38,730 INFO L225 Difference]: With dead ends: 24214 [2021-07-13 20:44:38,731 INFO L226 Difference]: Without dead ends: 24214 [2021-07-13 20:44:38,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 1944.4ms TimeCoverageRelationStatistics Valid=3677, Invalid=15505, Unknown=0, NotChecked=0, Total=19182 [2021-07-13 20:44:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24214 states. [2021-07-13 20:44:39,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24214 to 9398. [2021-07-13 20:44:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 3.6118974140683195) internal successors, (33941), 9397 states have internal predecessors, (33941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 33941 transitions. [2021-07-13 20:44:39,115 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 33941 transitions. Word has length 36 [2021-07-13 20:44:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:39,115 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 33941 transitions. [2021-07-13 20:44:39,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:39,116 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 33941 transitions. [2021-07-13 20:44:39,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:44:39,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:39,131 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:39,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:39,332 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:39,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1765665596, now seen corresponding path program 55 times [2021-07-13 20:44:39,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:39,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510981038] [2021-07-13 20:44:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:39,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:39,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510981038] [2021-07-13 20:44:39,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510981038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:39,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131991378] [2021-07-13 20:44:39,396 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:39,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:44:39,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:39,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131991378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:39,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:39,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:44:39,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682524111] [2021-07-13 20:44:39,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:44:39,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:39,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:44:39,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:44:39,607 INFO L87 Difference]: Start difference. First operand 9398 states and 33941 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:41,214 INFO L93 Difference]: Finished difference Result 23183 states and 75907 transitions. [2021-07-13 20:44:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:44:41,214 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:44:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:41,265 INFO L225 Difference]: With dead ends: 23183 [2021-07-13 20:44:41,265 INFO L226 Difference]: Without dead ends: 23183 [2021-07-13 20:44:41,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 879.4ms TimeCoverageRelationStatistics Valid=1560, Invalid=5246, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:44:41,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-07-13 20:44:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 9263. [2021-07-13 20:44:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9263 states, 9262 states have (on average 3.587670049665299) internal successors, (33229), 9262 states have internal predecessors, (33229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 33229 transitions. [2021-07-13 20:44:41,691 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 33229 transitions. Word has length 36 [2021-07-13 20:44:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:41,692 INFO L482 AbstractCegarLoop]: Abstraction has 9263 states and 33229 transitions. [2021-07-13 20:44:41,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 33229 transitions. [2021-07-13 20:44:41,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:44:41,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:41,706 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:41,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:41,907 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:41,907 INFO L82 PathProgramCache]: Analyzing trace with hash -610681024, now seen corresponding path program 56 times [2021-07-13 20:44:41,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:41,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932121963] [2021-07-13 20:44:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:41,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:41,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932121963] [2021-07-13 20:44:41,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932121963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:41,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546663577] [2021-07-13 20:44:41,974 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:41,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:41,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:41,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:44:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:42,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546663577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:42,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:42,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:44:42,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227226972] [2021-07-13 20:44:42,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:44:42,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:42,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:44:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:44:42,155 INFO L87 Difference]: Start difference. First operand 9263 states and 33229 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:43,153 INFO L93 Difference]: Finished difference Result 19614 states and 64898 transitions. [2021-07-13 20:44:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:44:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:44:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:43,196 INFO L225 Difference]: With dead ends: 19614 [2021-07-13 20:44:43,196 INFO L226 Difference]: Without dead ends: 19614 [2021-07-13 20:44:43,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 548.4ms TimeCoverageRelationStatistics Valid=763, Invalid=2777, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:44:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19614 states. [2021-07-13 20:44:43,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19614 to 9363. [2021-07-13 20:44:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9363 states, 9362 states have (on average 3.5803247169408245) internal successors, (33519), 9362 states have internal predecessors, (33519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9363 states to 9363 states and 33519 transitions. [2021-07-13 20:44:43,535 INFO L78 Accepts]: Start accepts. Automaton has 9363 states and 33519 transitions. Word has length 36 [2021-07-13 20:44:43,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:43,535 INFO L482 AbstractCegarLoop]: Abstraction has 9363 states and 33519 transitions. [2021-07-13 20:44:43,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 9363 states and 33519 transitions. [2021-07-13 20:44:43,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:44:43,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:43,550 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:43,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 20:44:43,751 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:43,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:43,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2146021892, now seen corresponding path program 57 times [2021-07-13 20:44:43,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:43,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012020928] [2021-07-13 20:44:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:43,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:43,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012020928] [2021-07-13 20:44:43,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012020928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:43,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230088227] [2021-07-13 20:44:43,812 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:43,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:44:43,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:43,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:44:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:43,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:44:43,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:43,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:43,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:43,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-07-13 20:44:43,960 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:44:43,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:44:43,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:43,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:43,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:43,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-07-13 20:44:44,072 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-07-13 20:44:44,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:44:44,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:44,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:44,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:44:44,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:46 [2021-07-13 20:44:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-07-13 20:44:44,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230088227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:44,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:44,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-13 20:44:44,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455815191] [2021-07-13 20:44:44,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:44:44,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:44,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:44:44,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:44:44,185 INFO L87 Difference]: Start difference. First operand 9363 states and 33519 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:50,622 INFO L93 Difference]: Finished difference Result 23064 states and 74612 transitions. [2021-07-13 20:44:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-07-13 20:44:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:44:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:50,678 INFO L225 Difference]: With dead ends: 23064 [2021-07-13 20:44:50,678 INFO L226 Difference]: Without dead ends: 22846 [2021-07-13 20:44:50,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9982 ImplicationChecksByTransitivity, 3632.9ms TimeCoverageRelationStatistics Valid=3338, Invalid=23068, Unknown=0, NotChecked=0, Total=26406 [2021-07-13 20:44:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22846 states. [2021-07-13 20:44:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22846 to 10239. [2021-07-13 20:44:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10239 states, 10238 states have (on average 3.6391873412775935) internal successors, (37258), 10238 states have internal predecessors, (37258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 37258 transitions. [2021-07-13 20:44:51,043 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 37258 transitions. Word has length 36 [2021-07-13 20:44:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:51,043 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 37258 transitions. [2021-07-13 20:44:51,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 37258 transitions. [2021-07-13 20:44:51,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:44:51,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:51,059 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:51,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:44:51,260 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:51,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1242329482, now seen corresponding path program 58 times [2021-07-13 20:44:51,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:51,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083176042] [2021-07-13 20:44:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:51,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:51,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083176042] [2021-07-13 20:44:51,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083176042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:51,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268071650] [2021-07-13 20:44:51,321 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:51,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:51,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:51,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:44:51,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:51,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268071650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:51,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:51,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:44:51,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623862076] [2021-07-13 20:44:51,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:51,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:51,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:51,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:51,490 INFO L87 Difference]: Start difference. First operand 10239 states and 37258 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:53,839 INFO L93 Difference]: Finished difference Result 24062 states and 79366 transitions. [2021-07-13 20:44:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-13 20:44:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:44:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:53,896 INFO L225 Difference]: With dead ends: 24062 [2021-07-13 20:44:53,896 INFO L226 Difference]: Without dead ends: 24054 [2021-07-13 20:44:53,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4827 ImplicationChecksByTransitivity, 1328.0ms TimeCoverageRelationStatistics Valid=2444, Invalid=10212, Unknown=0, NotChecked=0, Total=12656 [2021-07-13 20:44:53,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24054 states. [2021-07-13 20:44:54,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24054 to 10176. [2021-07-13 20:44:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 10175 states have (on average 3.6354791154791153) internal successors, (36991), 10175 states have internal predecessors, (36991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 36991 transitions. [2021-07-13 20:44:54,321 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 36991 transitions. Word has length 36 [2021-07-13 20:44:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:54,321 INFO L482 AbstractCegarLoop]: Abstraction has 10176 states and 36991 transitions. [2021-07-13 20:44:54,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 36991 transitions. [2021-07-13 20:44:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:44:54,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:54,337 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:54,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:54,538 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:54,538 INFO L82 PathProgramCache]: Analyzing trace with hash -999630980, now seen corresponding path program 59 times [2021-07-13 20:44:54,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:54,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393864451] [2021-07-13 20:44:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:54,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:54,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393864451] [2021-07-13 20:44:54,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393864451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:54,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523782705] [2021-07-13 20:44:54,583 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:54,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:44:54,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:54,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:44:54,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:54,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523782705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:54,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:54,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:44:54,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294638810] [2021-07-13 20:44:54,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:54,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:54,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:54,804 INFO L87 Difference]: Start difference. First operand 10176 states and 36991 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:57,615 INFO L93 Difference]: Finished difference Result 27302 states and 90504 transitions. [2021-07-13 20:44:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-07-13 20:44:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:44:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:57,679 INFO L225 Difference]: With dead ends: 27302 [2021-07-13 20:44:57,680 INFO L226 Difference]: Without dead ends: 27302 [2021-07-13 20:44:57,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8677 ImplicationChecksByTransitivity, 1890.3ms TimeCoverageRelationStatistics Valid=3708, Invalid=17754, Unknown=0, NotChecked=0, Total=21462 [2021-07-13 20:44:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27302 states. [2021-07-13 20:44:58,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27302 to 10278. [2021-07-13 20:44:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10278 states, 10277 states have (on average 3.647562518244624) internal successors, (37486), 10277 states have internal predecessors, (37486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10278 states to 10278 states and 37486 transitions. [2021-07-13 20:44:58,108 INFO L78 Accepts]: Start accepts. Automaton has 10278 states and 37486 transitions. Word has length 36 [2021-07-13 20:44:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:58,108 INFO L482 AbstractCegarLoop]: Abstraction has 10278 states and 37486 transitions. [2021-07-13 20:44:58,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 10278 states and 37486 transitions. [2021-07-13 20:44:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:44:58,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:58,125 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:58,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:58,326 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:58,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:58,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1594791238, now seen corresponding path program 60 times [2021-07-13 20:44:58,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:58,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181991475] [2021-07-13 20:44:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:58,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:58,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181991475] [2021-07-13 20:44:58,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181991475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:58,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112330321] [2021-07-13 20:44:58,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:58,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:44:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:44:58,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:58,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112330321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:58,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:58,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-07-13 20:44:58,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275464420] [2021-07-13 20:44:58,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:44:58,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:58,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:44:58,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:44:58,537 INFO L87 Difference]: Start difference. First operand 10278 states and 37486 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:59,436 INFO L93 Difference]: Finished difference Result 23076 states and 77948 transitions. [2021-07-13 20:44:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:44:59,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:44:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:59,489 INFO L225 Difference]: With dead ends: 23076 [2021-07-13 20:44:59,489 INFO L226 Difference]: Without dead ends: 23064 [2021-07-13 20:44:59,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 502.3ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:44:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23064 states. [2021-07-13 20:44:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23064 to 10277. [2021-07-13 20:44:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.6474309069676916) internal successors, (37481), 10276 states have internal predecessors, (37481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 37481 transitions. [2021-07-13 20:44:59,870 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 37481 transitions. Word has length 36 [2021-07-13 20:44:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:59,870 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 37481 transitions. [2021-07-13 20:44:59,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 37481 transitions. [2021-07-13 20:44:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:44:59,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:59,887 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:00,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:00,088 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:00,088 INFO L82 PathProgramCache]: Analyzing trace with hash 619738612, now seen corresponding path program 61 times [2021-07-13 20:45:00,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:00,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366102113] [2021-07-13 20:45:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:00,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:00,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366102113] [2021-07-13 20:45:00,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366102113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:00,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307974396] [2021-07-13 20:45:00,162 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:00,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:45:00,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:00,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307974396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:00,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:00,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 20:45:00,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269823163] [2021-07-13 20:45:00,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:00,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:00,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:00,327 INFO L87 Difference]: Start difference. First operand 10277 states and 37481 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:01,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:01,140 INFO L93 Difference]: Finished difference Result 21184 states and 71447 transitions. [2021-07-13 20:45:01,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:45:01,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:01,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:01,258 INFO L225 Difference]: With dead ends: 21184 [2021-07-13 20:45:01,258 INFO L226 Difference]: Without dead ends: 21184 [2021-07-13 20:45:01,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=579, Invalid=1971, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:45:01,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21184 states. [2021-07-13 20:45:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21184 to 10309. [2021-07-13 20:45:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10309 states, 10308 states have (on average 3.646779200620877) internal successors, (37591), 10308 states have internal predecessors, (37591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 37591 transitions. [2021-07-13 20:45:01,663 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 37591 transitions. Word has length 36 [2021-07-13 20:45:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:01,664 INFO L482 AbstractCegarLoop]: Abstraction has 10309 states and 37591 transitions. [2021-07-13 20:45:01,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 37591 transitions. [2021-07-13 20:45:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:01,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:01,683 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:01,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:01,884 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:01,884 INFO L82 PathProgramCache]: Analyzing trace with hash 334296516, now seen corresponding path program 62 times [2021-07-13 20:45:01,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:01,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80192667] [2021-07-13 20:45:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:01,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:01,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80192667] [2021-07-13 20:45:01,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80192667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:01,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931526023] [2021-07-13 20:45:01,939 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:45:01,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:01,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:01,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:45:01,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:02,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931526023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:02,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:02,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 20:45:02,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655830788] [2021-07-13 20:45:02,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:45:02,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:02,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:45:02,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:45:02,135 INFO L87 Difference]: Start difference. First operand 10309 states and 37591 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:03,384 INFO L93 Difference]: Finished difference Result 22583 states and 75226 transitions. [2021-07-13 20:45:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:45:03,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:03,514 INFO L225 Difference]: With dead ends: 22583 [2021-07-13 20:45:03,514 INFO L226 Difference]: Without dead ends: 22583 [2021-07-13 20:45:03,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 757.4ms TimeCoverageRelationStatistics Valid=1128, Invalid=3984, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:45:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22583 states. [2021-07-13 20:45:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22583 to 10288. [2021-07-13 20:45:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10288 states, 10287 states have (on average 3.621950034023525) internal successors, (37259), 10287 states have internal predecessors, (37259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10288 states to 10288 states and 37259 transitions. [2021-07-13 20:45:03,831 INFO L78 Accepts]: Start accepts. Automaton has 10288 states and 37259 transitions. Word has length 36 [2021-07-13 20:45:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:03,831 INFO L482 AbstractCegarLoop]: Abstraction has 10288 states and 37259 transitions. [2021-07-13 20:45:03,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 10288 states and 37259 transitions. [2021-07-13 20:45:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:03,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:03,848 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:04,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:04,048 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:04,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1645233024, now seen corresponding path program 63 times [2021-07-13 20:45:04,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:04,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922375532] [2021-07-13 20:45:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:04,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:04,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922375532] [2021-07-13 20:45:04,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922375532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:04,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545022516] [2021-07-13 20:45:04,118 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:04,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:45:04,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:04,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:45:04,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:04,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:45:04,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:04,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-07-13 20:45:04,298 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:45:04,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:45:04,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:04,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:45:04,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:34 [2021-07-13 20:45:04,391 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-07-13 20:45:04,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:45:04,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:04,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:45:04,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:49 [2021-07-13 20:45:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 20:45:04,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545022516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:04,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:04,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 20:45:04,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827992072] [2021-07-13 20:45:04,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:45:04,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:04,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:45:04,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:45:04,565 INFO L87 Difference]: Start difference. First operand 10288 states and 37259 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:08,968 INFO L93 Difference]: Finished difference Result 20591 states and 67124 transitions. [2021-07-13 20:45:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-07-13 20:45:08,968 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:09,017 INFO L225 Difference]: With dead ends: 20591 [2021-07-13 20:45:09,017 INFO L226 Difference]: Without dead ends: 20576 [2021-07-13 20:45:09,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5098 ImplicationChecksByTransitivity, 2912.1ms TimeCoverageRelationStatistics Valid=1942, Invalid=12578, Unknown=0, NotChecked=0, Total=14520 [2021-07-13 20:45:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20576 states. [2021-07-13 20:45:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20576 to 11680. [2021-07-13 20:45:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11680 states, 11679 states have (on average 3.5503895881496703) internal successors, (41465), 11679 states have internal predecessors, (41465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 41465 transitions. [2021-07-13 20:45:09,370 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 41465 transitions. Word has length 36 [2021-07-13 20:45:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:09,370 INFO L482 AbstractCegarLoop]: Abstraction has 11680 states and 41465 transitions. [2021-07-13 20:45:09,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 41465 transitions. [2021-07-13 20:45:09,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:09,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:09,390 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:09,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-13 20:45:09,590 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:09,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1594356878, now seen corresponding path program 64 times [2021-07-13 20:45:09,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:09,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11090503] [2021-07-13 20:45:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:09,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:09,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11090503] [2021-07-13 20:45:09,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11090503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:09,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014797842] [2021-07-13 20:45:09,649 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:09,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:09,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:09,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:45:09,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:09,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014797842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:09,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:09,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:45:09,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528061844] [2021-07-13 20:45:09,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:45:09,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:09,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:45:09,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:45:09,835 INFO L87 Difference]: Start difference. First operand 11680 states and 41465 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:12,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:12,189 INFO L93 Difference]: Finished difference Result 24526 states and 80567 transitions. [2021-07-13 20:45:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-13 20:45:12,190 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:12,248 INFO L225 Difference]: With dead ends: 24526 [2021-07-13 20:45:12,248 INFO L226 Difference]: Without dead ends: 24518 [2021-07-13 20:45:12,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 1467.8ms TimeCoverageRelationStatistics Valid=2276, Invalid=11766, Unknown=0, NotChecked=0, Total=14042 [2021-07-13 20:45:12,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24518 states. [2021-07-13 20:45:12,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24518 to 10224. [2021-07-13 20:45:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10224 states, 10223 states have (on average 3.5769343636897193) internal successors, (36567), 10223 states have internal predecessors, (36567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10224 states to 10224 states and 36567 transitions. [2021-07-13 20:45:12,636 INFO L78 Accepts]: Start accepts. Automaton has 10224 states and 36567 transitions. Word has length 36 [2021-07-13 20:45:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:12,636 INFO L482 AbstractCegarLoop]: Abstraction has 10224 states and 36567 transitions. [2021-07-13 20:45:12,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:12,636 INFO L276 IsEmpty]: Start isEmpty. Operand 10224 states and 36567 transitions. [2021-07-13 20:45:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:12,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:12,653 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:12,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:12,854 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:12,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:12,854 INFO L82 PathProgramCache]: Analyzing trace with hash 649769798, now seen corresponding path program 22 times [2021-07-13 20:45:12,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:12,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116802136] [2021-07-13 20:45:12,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:12,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:12,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116802136] [2021-07-13 20:45:12,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116802136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:12,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074277259] [2021-07-13 20:45:12,904 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:12,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:12,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:12,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:45:12,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:13,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074277259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:13,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:13,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 20:45:13,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86428208] [2021-07-13 20:45:13,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:45:13,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:13,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:45:13,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:45:13,072 INFO L87 Difference]: Start difference. First operand 10224 states and 36567 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:14,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:14,486 INFO L93 Difference]: Finished difference Result 23351 states and 75809 transitions. [2021-07-13 20:45:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:45:14,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:14,553 INFO L225 Difference]: With dead ends: 23351 [2021-07-13 20:45:14,553 INFO L226 Difference]: Without dead ends: 23351 [2021-07-13 20:45:14,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 829.4ms TimeCoverageRelationStatistics Valid=1338, Invalid=4514, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:45:14,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23351 states. [2021-07-13 20:45:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23351 to 10314. [2021-07-13 20:45:14,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10314 states, 10313 states have (on average 3.570638999321245) internal successors, (36824), 10313 states have internal predecessors, (36824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10314 states to 10314 states and 36824 transitions. [2021-07-13 20:45:15,008 INFO L78 Accepts]: Start accepts. Automaton has 10314 states and 36824 transitions. Word has length 36 [2021-07-13 20:45:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:15,008 INFO L482 AbstractCegarLoop]: Abstraction has 10314 states and 36824 transitions. [2021-07-13 20:45:15,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:15,009 INFO L276 IsEmpty]: Start isEmpty. Operand 10314 states and 36824 transitions. [2021-07-13 20:45:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:15,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:15,030 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:15,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 20:45:15,230 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:15,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1914163660, now seen corresponding path program 23 times [2021-07-13 20:45:15,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:15,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845264099] [2021-07-13 20:45:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:15,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:15,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845264099] [2021-07-13 20:45:15,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845264099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:15,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277366460] [2021-07-13 20:45:15,279 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:15,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:45:15,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:15,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:45:15,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:15,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277366460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:15,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:15,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 20:45:15,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626825074] [2021-07-13 20:45:15,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:45:15,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:15,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:45:15,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:45:15,475 INFO L87 Difference]: Start difference. First operand 10314 states and 36824 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:19,341 INFO L93 Difference]: Finished difference Result 25345 states and 80932 transitions. [2021-07-13 20:45:19,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-07-13 20:45:19,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:19,416 INFO L225 Difference]: With dead ends: 25345 [2021-07-13 20:45:19,416 INFO L226 Difference]: Without dead ends: 25341 [2021-07-13 20:45:19,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12290 ImplicationChecksByTransitivity, 2630.0ms TimeCoverageRelationStatistics Valid=4827, Invalid=25275, Unknown=0, NotChecked=0, Total=30102 [2021-07-13 20:45:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25341 states. [2021-07-13 20:45:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25341 to 10697. [2021-07-13 20:45:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 3.5331899775617055) internal successors, (37791), 10696 states have internal predecessors, (37791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 37791 transitions. [2021-07-13 20:45:19,887 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 37791 transitions. Word has length 36 [2021-07-13 20:45:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:19,887 INFO L482 AbstractCegarLoop]: Abstraction has 10697 states and 37791 transitions. [2021-07-13 20:45:19,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 37791 transitions. [2021-07-13 20:45:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:19,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:19,908 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:20,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-13 20:45:20,109 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:20,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1955379200, now seen corresponding path program 65 times [2021-07-13 20:45:20,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:20,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085860930] [2021-07-13 20:45:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:20,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:20,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085860930] [2021-07-13 20:45:20,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085860930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:20,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330080574] [2021-07-13 20:45:20,164 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:20,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:45:20,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:20,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:45:20,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:20,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330080574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:20,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:20,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:45:20,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114443304] [2021-07-13 20:45:20,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:45:20,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:45:20,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:45:20,398 INFO L87 Difference]: Start difference. First operand 10697 states and 37791 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:21,562 INFO L93 Difference]: Finished difference Result 28584 states and 95318 transitions. [2021-07-13 20:45:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:45:21,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:21,652 INFO L225 Difference]: With dead ends: 28584 [2021-07-13 20:45:21,652 INFO L226 Difference]: Without dead ends: 28584 [2021-07-13 20:45:21,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 635.1ms TimeCoverageRelationStatistics Valid=1025, Invalid=2757, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:45:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28584 states. [2021-07-13 20:45:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28584 to 11040. [2021-07-13 20:45:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11040 states, 11039 states have (on average 3.5667179998188243) internal successors, (39373), 11039 states have internal predecessors, (39373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11040 states to 11040 states and 39373 transitions. [2021-07-13 20:45:22,262 INFO L78 Accepts]: Start accepts. Automaton has 11040 states and 39373 transitions. Word has length 36 [2021-07-13 20:45:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:22,262 INFO L482 AbstractCegarLoop]: Abstraction has 11040 states and 39373 transitions. [2021-07-13 20:45:22,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand 11040 states and 39373 transitions. [2021-07-13 20:45:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:22,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:22,280 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:22,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:22,483 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:22,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:22,484 INFO L82 PathProgramCache]: Analyzing trace with hash 835382162, now seen corresponding path program 66 times [2021-07-13 20:45:22,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:22,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699964770] [2021-07-13 20:45:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:22,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:22,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699964770] [2021-07-13 20:45:22,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699964770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:22,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119179999] [2021-07-13 20:45:22,527 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:22,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:45:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:22,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:45:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:22,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119179999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:22,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:22,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:45:22,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860784836] [2021-07-13 20:45:22,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:22,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:22,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:22,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:22,718 INFO L87 Difference]: Start difference. First operand 11040 states and 39373 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:25,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:25,022 INFO L93 Difference]: Finished difference Result 28065 states and 91868 transitions. [2021-07-13 20:45:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-07-13 20:45:25,022 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:25,093 INFO L225 Difference]: With dead ends: 28065 [2021-07-13 20:45:25,094 INFO L226 Difference]: Without dead ends: 28057 [2021-07-13 20:45:25,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4765 ImplicationChecksByTransitivity, 1450.5ms TimeCoverageRelationStatistics Valid=2261, Invalid=10171, Unknown=0, NotChecked=0, Total=12432 [2021-07-13 20:45:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28057 states. [2021-07-13 20:45:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28057 to 11031. [2021-07-13 20:45:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11031 states, 11030 states have (on average 3.565185856754306) internal successors, (39324), 11030 states have internal predecessors, (39324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 39324 transitions. [2021-07-13 20:45:25,529 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 39324 transitions. Word has length 36 [2021-07-13 20:45:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:25,529 INFO L482 AbstractCegarLoop]: Abstraction has 11031 states and 39324 transitions. [2021-07-13 20:45:25,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 39324 transitions. [2021-07-13 20:45:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:25,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:25,549 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:25,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:25,749 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:25,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:25,749 INFO L82 PathProgramCache]: Analyzing trace with hash -645736056, now seen corresponding path program 67 times [2021-07-13 20:45:25,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:25,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191599385] [2021-07-13 20:45:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:25,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:25,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191599385] [2021-07-13 20:45:25,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191599385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:25,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818079540] [2021-07-13 20:45:25,794 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:25,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:45:25,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:25,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818079540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:25,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:25,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 20:45:25,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929003557] [2021-07-13 20:45:25,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:25,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:25,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:25,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:25,965 INFO L87 Difference]: Start difference. First operand 11031 states and 39324 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:27,307 INFO L93 Difference]: Finished difference Result 25852 states and 84621 transitions. [2021-07-13 20:45:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:45:27,307 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:27,372 INFO L225 Difference]: With dead ends: 25852 [2021-07-13 20:45:27,373 INFO L226 Difference]: Without dead ends: 25852 [2021-07-13 20:45:27,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 808.3ms TimeCoverageRelationStatistics Valid=1383, Invalid=4019, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:45:27,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25852 states. [2021-07-13 20:45:27,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25852 to 11109. [2021-07-13 20:45:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11109 states, 11108 states have (on average 3.5620273676629455) internal successors, (39567), 11108 states have internal predecessors, (39567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11109 states to 11109 states and 39567 transitions. [2021-07-13 20:45:27,814 INFO L78 Accepts]: Start accepts. Automaton has 11109 states and 39567 transitions. Word has length 36 [2021-07-13 20:45:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:27,814 INFO L482 AbstractCegarLoop]: Abstraction has 11109 states and 39567 transitions. [2021-07-13 20:45:27,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 11109 states and 39567 transitions. [2021-07-13 20:45:27,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:27,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:27,832 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:28,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:28,033 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:28,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1701113450, now seen corresponding path program 68 times [2021-07-13 20:45:28,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:28,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965243448] [2021-07-13 20:45:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:28,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:28,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965243448] [2021-07-13 20:45:28,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965243448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:28,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823264802] [2021-07-13 20:45:28,085 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:28,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:28,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:28,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:45:28,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:28,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823264802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:28,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:28,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 20:45:28,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925975860] [2021-07-13 20:45:28,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:45:28,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:28,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:45:28,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:45:28,274 INFO L87 Difference]: Start difference. First operand 11109 states and 39567 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:30,774 INFO L93 Difference]: Finished difference Result 26133 states and 85715 transitions. [2021-07-13 20:45:30,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-13 20:45:30,775 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:30,838 INFO L225 Difference]: With dead ends: 26133 [2021-07-13 20:45:30,839 INFO L226 Difference]: Without dead ends: 26125 [2021-07-13 20:45:30,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5792 ImplicationChecksByTransitivity, 1466.1ms TimeCoverageRelationStatistics Valid=2641, Invalid=12859, Unknown=0, NotChecked=0, Total=15500 [2021-07-13 20:45:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26125 states. [2021-07-13 20:45:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26125 to 10815. [2021-07-13 20:45:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10815 states, 10814 states have (on average 3.549935269095617) internal successors, (38389), 10814 states have internal predecessors, (38389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10815 states to 10815 states and 38389 transitions. [2021-07-13 20:45:31,215 INFO L78 Accepts]: Start accepts. Automaton has 10815 states and 38389 transitions. Word has length 36 [2021-07-13 20:45:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:31,215 INFO L482 AbstractCegarLoop]: Abstraction has 10815 states and 38389 transitions. [2021-07-13 20:45:31,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 10815 states and 38389 transitions. [2021-07-13 20:45:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:31,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:31,233 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:31,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-07-13 20:45:31,433 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:31,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1129408980, now seen corresponding path program 69 times [2021-07-13 20:45:31,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:31,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922765373] [2021-07-13 20:45:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:31,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:31,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922765373] [2021-07-13 20:45:31,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922765373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:31,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073867009] [2021-07-13 20:45:31,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:31,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:45:31,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:31,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:45:31,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:31,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073867009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:31,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:31,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:45:31,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959921966] [2021-07-13 20:45:31,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:45:31,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:31,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:45:31,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:45:31,654 INFO L87 Difference]: Start difference. First operand 10815 states and 38389 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:33,396 INFO L93 Difference]: Finished difference Result 25481 states and 83280 transitions. [2021-07-13 20:45:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-13 20:45:33,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:33,470 INFO L225 Difference]: With dead ends: 25481 [2021-07-13 20:45:33,470 INFO L226 Difference]: Without dead ends: 25421 [2021-07-13 20:45:33,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 955.3ms TimeCoverageRelationStatistics Valid=1884, Invalid=7622, Unknown=0, NotChecked=0, Total=9506 [2021-07-13 20:45:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25421 states. [2021-07-13 20:45:33,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25421 to 10825. [2021-07-13 20:45:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10825 states, 10824 states have (on average 3.5495195861049518) internal successors, (38420), 10824 states have internal predecessors, (38420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10825 states to 10825 states and 38420 transitions. [2021-07-13 20:45:33,833 INFO L78 Accepts]: Start accepts. Automaton has 10825 states and 38420 transitions. Word has length 36 [2021-07-13 20:45:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:33,833 INFO L482 AbstractCegarLoop]: Abstraction has 10825 states and 38420 transitions. [2021-07-13 20:45:33,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 10825 states and 38420 transitions. [2021-07-13 20:45:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:33,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:33,850 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:34,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:34,052 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:34,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1944063276, now seen corresponding path program 70 times [2021-07-13 20:45:34,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:34,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837002616] [2021-07-13 20:45:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:34,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:34,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837002616] [2021-07-13 20:45:34,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837002616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:34,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544619379] [2021-07-13 20:45:34,102 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:45:34,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:34,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:34,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:45:34,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:34,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544619379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:34,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:34,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:45:34,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738693928] [2021-07-13 20:45:34,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:45:34,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:34,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:45:34,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:45:34,248 INFO L87 Difference]: Start difference. First operand 10825 states and 38420 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:35,344 INFO L93 Difference]: Finished difference Result 25553 states and 83090 transitions. [2021-07-13 20:45:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:45:35,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:35,410 INFO L225 Difference]: With dead ends: 25553 [2021-07-13 20:45:35,410 INFO L226 Difference]: Without dead ends: 25553 [2021-07-13 20:45:35,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=1205, Invalid=3625, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:45:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25553 states. [2021-07-13 20:45:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25553 to 11156. [2021-07-13 20:45:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 3.528731510533393) internal successors, (39363), 11155 states have internal predecessors, (39363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 39363 transitions. [2021-07-13 20:45:35,858 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 39363 transitions. Word has length 36 [2021-07-13 20:45:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:35,858 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 39363 transitions. [2021-07-13 20:45:35,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 39363 transitions. [2021-07-13 20:45:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:35,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:35,875 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:36,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-13 20:45:36,075 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:36,076 INFO L82 PathProgramCache]: Analyzing trace with hash -417474388, now seen corresponding path program 71 times [2021-07-13 20:45:36,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:36,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077246867] [2021-07-13 20:45:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:36,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:36,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077246867] [2021-07-13 20:45:36,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077246867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:36,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426227200] [2021-07-13 20:45:36,126 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:36,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:45:36,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:36,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:45:36,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:36,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426227200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:36,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:36,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 20:45:36,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46730634] [2021-07-13 20:45:36,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:36,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:36,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:36,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:36,305 INFO L87 Difference]: Start difference. First operand 11156 states and 39363 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:38,169 INFO L93 Difference]: Finished difference Result 24060 states and 79445 transitions. [2021-07-13 20:45:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:45:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:38,233 INFO L225 Difference]: With dead ends: 24060 [2021-07-13 20:45:38,234 INFO L226 Difference]: Without dead ends: 23988 [2021-07-13 20:45:38,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3341 ImplicationChecksByTransitivity, 1081.6ms TimeCoverageRelationStatistics Valid=1989, Invalid=7323, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 20:45:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23988 states. [2021-07-13 20:45:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23988 to 11635. [2021-07-13 20:45:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 11634 states have (on average 3.5373044524669073) internal successors, (41153), 11634 states have internal predecessors, (41153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 41153 transitions. [2021-07-13 20:45:38,663 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 41153 transitions. Word has length 36 [2021-07-13 20:45:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:38,663 INFO L482 AbstractCegarLoop]: Abstraction has 11635 states and 41153 transitions. [2021-07-13 20:45:38,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:38,664 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 41153 transitions. [2021-07-13 20:45:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:38,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:38,682 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:38,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:38,892 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:38,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:38,892 INFO L82 PathProgramCache]: Analyzing trace with hash -56872508, now seen corresponding path program 72 times [2021-07-13 20:45:38,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:38,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400092218] [2021-07-13 20:45:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:38,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:38,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400092218] [2021-07-13 20:45:38,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400092218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:38,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450838254] [2021-07-13 20:45:38,932 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:38,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:45:38,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:45:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:39,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450838254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:39,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:39,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:45:39,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22994127] [2021-07-13 20:45:39,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:39,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:39,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:39,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:39,105 INFO L87 Difference]: Start difference. First operand 11635 states and 41153 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:41,776 INFO L93 Difference]: Finished difference Result 32188 states and 105890 transitions. [2021-07-13 20:45:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-07-13 20:45:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:41,855 INFO L225 Difference]: With dead ends: 32188 [2021-07-13 20:45:41,856 INFO L226 Difference]: Without dead ends: 32188 [2021-07-13 20:45:41,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7629 ImplicationChecksByTransitivity, 1715.0ms TimeCoverageRelationStatistics Valid=3449, Invalid=15183, Unknown=0, NotChecked=0, Total=18632 [2021-07-13 20:45:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32188 states. [2021-07-13 20:45:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32188 to 11859. [2021-07-13 20:45:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11859 states, 11858 states have (on average 3.5428402766065106) internal successors, (42011), 11858 states have internal predecessors, (42011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11859 states to 11859 states and 42011 transitions. [2021-07-13 20:45:42,315 INFO L78 Accepts]: Start accepts. Automaton has 11859 states and 42011 transitions. Word has length 36 [2021-07-13 20:45:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:42,316 INFO L482 AbstractCegarLoop]: Abstraction has 11859 states and 42011 transitions. [2021-07-13 20:45:42,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 11859 states and 42011 transitions. [2021-07-13 20:45:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:42,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:42,335 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:42,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:42,536 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:42,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1328456694, now seen corresponding path program 73 times [2021-07-13 20:45:42,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:42,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420510528] [2021-07-13 20:45:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:42,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:42,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420510528] [2021-07-13 20:45:42,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420510528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:42,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926946638] [2021-07-13 20:45:42,592 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:42,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:45:42,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:42,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926946638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:42,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:42,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 20:45:42,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646348974] [2021-07-13 20:45:42,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:42,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:42,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:42,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:42,761 INFO L87 Difference]: Start difference. First operand 11859 states and 42011 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:43,665 INFO L93 Difference]: Finished difference Result 21337 states and 71691 transitions. [2021-07-13 20:45:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:45:43,666 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:43,725 INFO L225 Difference]: With dead ends: 21337 [2021-07-13 20:45:43,726 INFO L226 Difference]: Without dead ends: 21337 [2021-07-13 20:45:43,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 479.0ms TimeCoverageRelationStatistics Valid=705, Invalid=2375, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:45:43,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21337 states. [2021-07-13 20:45:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21337 to 12014. [2021-07-13 20:45:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 3.539082660451178) internal successors, (42515), 12013 states have internal predecessors, (42515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42515 transitions. [2021-07-13 20:45:44,120 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42515 transitions. Word has length 36 [2021-07-13 20:45:44,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:44,120 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42515 transitions. [2021-07-13 20:45:44,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42515 transitions. [2021-07-13 20:45:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:44,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:44,151 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:44,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-13 20:45:44,357 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:44,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:44,357 INFO L82 PathProgramCache]: Analyzing trace with hash -757061290, now seen corresponding path program 74 times [2021-07-13 20:45:44,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:44,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721929332] [2021-07-13 20:45:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:44,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:44,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721929332] [2021-07-13 20:45:44,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721929332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:44,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988720451] [2021-07-13 20:45:44,404 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:44,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:44,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:44,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:45:44,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:45:44,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988720451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:44,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:44,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 20:45:44,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877601564] [2021-07-13 20:45:44,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:44,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:44,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:44,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:44,571 INFO L87 Difference]: Start difference. First operand 12014 states and 42515 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:46,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:46,383 INFO L93 Difference]: Finished difference Result 23584 states and 78972 transitions. [2021-07-13 20:45:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-13 20:45:46,383 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:46,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:46,445 INFO L225 Difference]: With dead ends: 23584 [2021-07-13 20:45:46,445 INFO L226 Difference]: Without dead ends: 23568 [2021-07-13 20:45:46,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4149 ImplicationChecksByTransitivity, 1152.3ms TimeCoverageRelationStatistics Valid=2031, Invalid=9311, Unknown=0, NotChecked=0, Total=11342 [2021-07-13 20:45:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23568 states. [2021-07-13 20:45:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23568 to 12014. [2021-07-13 20:45:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 3.5387496878381755) internal successors, (42511), 12013 states have internal predecessors, (42511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42511 transitions. [2021-07-13 20:45:46,868 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42511 transitions. Word has length 36 [2021-07-13 20:45:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:46,868 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42511 transitions. [2021-07-13 20:45:46,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42511 transitions. [2021-07-13 20:45:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:46,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:46,888 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:47,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:47,102 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:47,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1893700292, now seen corresponding path program 24 times [2021-07-13 20:45:47,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:47,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875153981] [2021-07-13 20:45:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:47,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:47,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875153981] [2021-07-13 20:45:47,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875153981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:47,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918909988] [2021-07-13 20:45:47,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:47,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:45:47,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:45:47,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:45:47,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918909988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:47,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:47,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 20:45:47,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309561266] [2021-07-13 20:45:47,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:45:47,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:47,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:45:47,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:45:47,330 INFO L87 Difference]: Start difference. First operand 12014 states and 42511 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:51,160 INFO L93 Difference]: Finished difference Result 24185 states and 80281 transitions. [2021-07-13 20:45:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-07-13 20:45:51,160 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:51,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:51,217 INFO L225 Difference]: With dead ends: 24185 [2021-07-13 20:45:51,217 INFO L226 Difference]: Without dead ends: 24161 [2021-07-13 20:45:51,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15417 ImplicationChecksByTransitivity, 2749.7ms TimeCoverageRelationStatistics Valid=5544, Invalid=31128, Unknown=0, NotChecked=0, Total=36672 [2021-07-13 20:45:51,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24161 states. [2021-07-13 20:45:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24161 to 12318. [2021-07-13 20:45:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12318 states, 12317 states have (on average 3.522935779816514) internal successors, (43392), 12317 states have internal predecessors, (43392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:51,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12318 states to 12318 states and 43392 transitions. [2021-07-13 20:45:51,607 INFO L78 Accepts]: Start accepts. Automaton has 12318 states and 43392 transitions. Word has length 36 [2021-07-13 20:45:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:51,607 INFO L482 AbstractCegarLoop]: Abstraction has 12318 states and 43392 transitions. [2021-07-13 20:45:51,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 12318 states and 43392 transitions. [2021-07-13 20:45:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:51,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:51,627 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:51,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:51,828 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:51,828 INFO L82 PathProgramCache]: Analyzing trace with hash 14650632, now seen corresponding path program 75 times [2021-07-13 20:45:51,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:51,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026656403] [2021-07-13 20:45:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:51,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:51,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026656403] [2021-07-13 20:45:51,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026656403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:51,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859165923] [2021-07-13 20:45:51,886 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:51,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:45:51,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:51,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:45:51,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:52,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859165923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:52,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:52,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:45:52,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078765578] [2021-07-13 20:45:52,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:52,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:52,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:52,046 INFO L87 Difference]: Start difference. First operand 12318 states and 43392 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:53,209 INFO L93 Difference]: Finished difference Result 30224 states and 99175 transitions. [2021-07-13 20:45:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:45:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:53,283 INFO L225 Difference]: With dead ends: 30224 [2021-07-13 20:45:53,283 INFO L226 Difference]: Without dead ends: 30224 [2021-07-13 20:45:53,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 654.5ms TimeCoverageRelationStatistics Valid=959, Invalid=2701, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:45:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30224 states. [2021-07-13 20:45:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30224 to 13376. [2021-07-13 20:45:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13376 states, 13375 states have (on average 3.5404859813084113) internal successors, (47354), 13375 states have internal predecessors, (47354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 47354 transitions. [2021-07-13 20:45:53,761 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 47354 transitions. Word has length 36 [2021-07-13 20:45:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:53,761 INFO L482 AbstractCegarLoop]: Abstraction has 13376 states and 47354 transitions. [2021-07-13 20:45:53,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 47354 transitions. [2021-07-13 20:45:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:53,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:53,792 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:53,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 20:45:53,992 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1040726762, now seen corresponding path program 76 times [2021-07-13 20:45:53,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:53,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901495806] [2021-07-13 20:45:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:54,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:54,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901495806] [2021-07-13 20:45:54,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901495806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:54,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766900870] [2021-07-13 20:45:54,044 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:54,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:54,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:54,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:45:54,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:54,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766900870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:54,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:54,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-13 20:45:54,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416064678] [2021-07-13 20:45:54,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:54,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:54,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:54,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:54,185 INFO L87 Difference]: Start difference. First operand 13376 states and 47354 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:56,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:56,716 INFO L93 Difference]: Finished difference Result 31957 states and 103754 transitions. [2021-07-13 20:45:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-07-13 20:45:56,716 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:56,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:56,790 INFO L225 Difference]: With dead ends: 31957 [2021-07-13 20:45:56,790 INFO L226 Difference]: Without dead ends: 31941 [2021-07-13 20:45:56,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7670 ImplicationChecksByTransitivity, 1725.0ms TimeCoverageRelationStatistics Valid=3631, Invalid=15551, Unknown=0, NotChecked=0, Total=19182 [2021-07-13 20:45:56,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31941 states. [2021-07-13 20:45:57,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31941 to 12804. [2021-07-13 20:45:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12804 states, 12803 states have (on average 3.5590096071233304) internal successors, (45566), 12803 states have internal predecessors, (45566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12804 states to 12804 states and 45566 transitions. [2021-07-13 20:45:57,252 INFO L78 Accepts]: Start accepts. Automaton has 12804 states and 45566 transitions. Word has length 36 [2021-07-13 20:45:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:57,252 INFO L482 AbstractCegarLoop]: Abstraction has 12804 states and 45566 transitions. [2021-07-13 20:45:57,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 12804 states and 45566 transitions. [2021-07-13 20:45:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:45:57,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:57,274 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:57,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 20:45:57,475 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1670020454, now seen corresponding path program 77 times [2021-07-13 20:45:57,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:57,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451301756] [2021-07-13 20:45:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:57,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:57,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451301756] [2021-07-13 20:45:57,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451301756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:57,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649423648] [2021-07-13 20:45:57,533 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:57,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:45:57,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:57,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:45:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:45:57,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649423648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:57,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:57,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:45:57,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495370160] [2021-07-13 20:45:57,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:45:57,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:57,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:45:57,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:45:57,667 INFO L87 Difference]: Start difference. First operand 12804 states and 45566 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:59,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:59,620 INFO L93 Difference]: Finished difference Result 29035 states and 95366 transitions. [2021-07-13 20:45:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-13 20:45:59,621 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:45:59,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:59,703 INFO L225 Difference]: With dead ends: 29035 [2021-07-13 20:45:59,703 INFO L226 Difference]: Without dead ends: 28951 [2021-07-13 20:45:59,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4298 ImplicationChecksByTransitivity, 1203.8ms TimeCoverageRelationStatistics Valid=2386, Invalid=8956, Unknown=0, NotChecked=0, Total=11342 [2021-07-13 20:45:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-07-13 20:46:00,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 12660. [2021-07-13 20:46:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12660 states, 12659 states have (on average 3.5663164546962633) internal successors, (45146), 12659 states have internal predecessors, (45146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12660 states to 12660 states and 45146 transitions. [2021-07-13 20:46:00,147 INFO L78 Accepts]: Start accepts. Automaton has 12660 states and 45146 transitions. Word has length 36 [2021-07-13 20:46:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:00,147 INFO L482 AbstractCegarLoop]: Abstraction has 12660 states and 45146 transitions. [2021-07-13 20:46:00,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 12660 states and 45146 transitions. [2021-07-13 20:46:00,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:00,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:00,170 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:00,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 20:46:00,371 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1988479988, now seen corresponding path program 78 times [2021-07-13 20:46:00,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:00,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638318182] [2021-07-13 20:46:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:00,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:00,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638318182] [2021-07-13 20:46:00,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638318182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:00,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53956991] [2021-07-13 20:46:00,422 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:00,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:46:00,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:00,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:46:00,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-13 20:46:00,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:00,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:00,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:00,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-07-13 20:46:00,633 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-07-13 20:46:00,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-07-13 20:46:00,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:00,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:00,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:00,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-13 20:46:00,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:00,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:00,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:00,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-07-13 20:46:00,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:00,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:00,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:46:00,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-07-13 20:46:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:46:00,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53956991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:00,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:00,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-13 20:46:00,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356105955] [2021-07-13 20:46:00,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:46:00,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:00,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:46:00,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:46:00,861 INFO L87 Difference]: Start difference. First operand 12660 states and 45146 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:04,699 INFO L93 Difference]: Finished difference Result 27292 states and 89638 transitions. [2021-07-13 20:46:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-07-13 20:46:04,700 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:04,769 INFO L225 Difference]: With dead ends: 27292 [2021-07-13 20:46:04,769 INFO L226 Difference]: Without dead ends: 27101 [2021-07-13 20:46:04,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10096 ImplicationChecksByTransitivity, 2784.2ms TimeCoverageRelationStatistics Valid=3156, Invalid=22604, Unknown=0, NotChecked=0, Total=25760 [2021-07-13 20:46:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27101 states. [2021-07-13 20:46:05,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27101 to 12693. [2021-07-13 20:46:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12693 states, 12692 states have (on average 3.567601638827608) internal successors, (45280), 12692 states have internal predecessors, (45280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12693 states to 12693 states and 45280 transitions. [2021-07-13 20:46:05,179 INFO L78 Accepts]: Start accepts. Automaton has 12693 states and 45280 transitions. Word has length 36 [2021-07-13 20:46:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:05,179 INFO L482 AbstractCegarLoop]: Abstraction has 12693 states and 45280 transitions. [2021-07-13 20:46:05,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 12693 states and 45280 transitions. [2021-07-13 20:46:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:05,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:05,200 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:05,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 20:46:05,401 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:05,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1792794872, now seen corresponding path program 79 times [2021-07-13 20:46:05,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:05,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798561564] [2021-07-13 20:46:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:05,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:05,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798561564] [2021-07-13 20:46:05,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798561564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:05,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790057050] [2021-07-13 20:46:05,451 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:05,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:46:05,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:05,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790057050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:05,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:05,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:46:05,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147013973] [2021-07-13 20:46:05,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:46:05,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:05,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:46:05,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:46:05,624 INFO L87 Difference]: Start difference. First operand 12693 states and 45280 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:06,522 INFO L93 Difference]: Finished difference Result 30802 states and 102946 transitions. [2021-07-13 20:46:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:46:06,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:06,614 INFO L225 Difference]: With dead ends: 30802 [2021-07-13 20:46:06,614 INFO L226 Difference]: Without dead ends: 30802 [2021-07-13 20:46:06,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=588, Invalid=1574, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:46:06,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-07-13 20:46:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 12697. [2021-07-13 20:46:07,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12697 states, 12696 states have (on average 3.5682104599873976) internal successors, (45302), 12696 states have internal predecessors, (45302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12697 states to 12697 states and 45302 transitions. [2021-07-13 20:46:07,268 INFO L78 Accepts]: Start accepts. Automaton has 12697 states and 45302 transitions. Word has length 36 [2021-07-13 20:46:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:07,268 INFO L482 AbstractCegarLoop]: Abstraction has 12697 states and 45302 transitions. [2021-07-13 20:46:07,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 12697 states and 45302 transitions. [2021-07-13 20:46:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:07,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:07,295 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:07,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 20:46:07,495 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:07,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1230140076, now seen corresponding path program 80 times [2021-07-13 20:46:07,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:07,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595386749] [2021-07-13 20:46:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:07,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:07,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595386749] [2021-07-13 20:46:07,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595386749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:07,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66896546] [2021-07-13 20:46:07,555 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:07,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:07,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:07,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:46:07,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:46:07,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66896546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:07,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:07,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:46:07,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529794862] [2021-07-13 20:46:07,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:46:07,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:07,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:46:07,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:46:07,748 INFO L87 Difference]: Start difference. First operand 12697 states and 45302 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:11,395 INFO L93 Difference]: Finished difference Result 33049 states and 107981 transitions. [2021-07-13 20:46:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-07-13 20:46:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:11,493 INFO L225 Difference]: With dead ends: 33049 [2021-07-13 20:46:11,493 INFO L226 Difference]: Without dead ends: 32977 [2021-07-13 20:46:11,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11512 ImplicationChecksByTransitivity, 2342.4ms TimeCoverageRelationStatistics Valid=4716, Invalid=23006, Unknown=0, NotChecked=0, Total=27722 [2021-07-13 20:46:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32977 states. [2021-07-13 20:46:12,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32977 to 12738. [2021-07-13 20:46:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12738 states, 12737 states have (on average 3.5727408337913165) internal successors, (45506), 12737 states have internal predecessors, (45506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12738 states to 12738 states and 45506 transitions. [2021-07-13 20:46:12,081 INFO L78 Accepts]: Start accepts. Automaton has 12738 states and 45506 transitions. Word has length 36 [2021-07-13 20:46:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:12,081 INFO L482 AbstractCegarLoop]: Abstraction has 12738 states and 45506 transitions. [2021-07-13 20:46:12,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 12738 states and 45506 transitions. [2021-07-13 20:46:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:12,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:12,108 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:12,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-13 20:46:12,308 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:12,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:12,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2017838672, now seen corresponding path program 81 times [2021-07-13 20:46:12,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:12,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020811422] [2021-07-13 20:46:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:12,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:12,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020811422] [2021-07-13 20:46:12,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020811422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:12,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987556568] [2021-07-13 20:46:12,380 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:12,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:46:12,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:12,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:46:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:12,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987556568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:12,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:12,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-07-13 20:46:12,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014420782] [2021-07-13 20:46:12,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:46:12,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:12,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:46:12,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:46:12,543 INFO L87 Difference]: Start difference. First operand 12738 states and 45506 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:14,027 INFO L93 Difference]: Finished difference Result 28529 states and 93962 transitions. [2021-07-13 20:46:14,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:46:14,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:14,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:14,097 INFO L225 Difference]: With dead ends: 28529 [2021-07-13 20:46:14,097 INFO L226 Difference]: Without dead ends: 28385 [2021-07-13 20:46:14,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2641 ImplicationChecksByTransitivity, 820.6ms TimeCoverageRelationStatistics Valid=1478, Invalid=6004, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:46:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28385 states. [2021-07-13 20:46:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28385 to 12796. [2021-07-13 20:46:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12796 states, 12795 states have (on average 3.569753810082063) internal successors, (45675), 12795 states have internal predecessors, (45675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12796 states to 12796 states and 45675 transitions. [2021-07-13 20:46:14,524 INFO L78 Accepts]: Start accepts. Automaton has 12796 states and 45675 transitions. Word has length 36 [2021-07-13 20:46:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:14,524 INFO L482 AbstractCegarLoop]: Abstraction has 12796 states and 45675 transitions. [2021-07-13 20:46:14,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:14,524 INFO L276 IsEmpty]: Start isEmpty. Operand 12796 states and 45675 transitions. [2021-07-13 20:46:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:14,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:14,548 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:14,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 20:46:14,748 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:14,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:14,748 INFO L82 PathProgramCache]: Analyzing trace with hash -545537740, now seen corresponding path program 82 times [2021-07-13 20:46:14,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:14,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696577999] [2021-07-13 20:46:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:14,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:14,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696577999] [2021-07-13 20:46:14,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696577999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:14,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614679628] [2021-07-13 20:46:14,798 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:14,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:14,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:14,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:46:14,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:14,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614679628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:14,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:14,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-13 20:46:14,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578904493] [2021-07-13 20:46:14,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:46:14,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:14,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:46:14,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:46:14,921 INFO L87 Difference]: Start difference. First operand 12796 states and 45675 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:16,812 INFO L93 Difference]: Finished difference Result 30495 states and 99403 transitions. [2021-07-13 20:46:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-13 20:46:16,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:16,883 INFO L225 Difference]: With dead ends: 30495 [2021-07-13 20:46:16,883 INFO L226 Difference]: Without dead ends: 30483 [2021-07-13 20:46:16,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5685 ImplicationChecksByTransitivity, 1215.2ms TimeCoverageRelationStatistics Valid=2727, Invalid=11315, Unknown=0, NotChecked=0, Total=14042 [2021-07-13 20:46:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30483 states. [2021-07-13 20:46:17,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30483 to 11108. [2021-07-13 20:46:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11108 states, 11107 states have (on average 3.466822724408031) internal successors, (38506), 11107 states have internal predecessors, (38506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11108 states to 11108 states and 38506 transitions. [2021-07-13 20:46:17,292 INFO L78 Accepts]: Start accepts. Automaton has 11108 states and 38506 transitions. Word has length 36 [2021-07-13 20:46:17,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:17,292 INFO L482 AbstractCegarLoop]: Abstraction has 11108 states and 38506 transitions. [2021-07-13 20:46:17,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 11108 states and 38506 transitions. [2021-07-13 20:46:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:17,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:17,309 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:17,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:17,509 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:17,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:17,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1920078252, now seen corresponding path program 83 times [2021-07-13 20:46:17,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:17,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500211728] [2021-07-13 20:46:17,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:17,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:17,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500211728] [2021-07-13 20:46:17,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500211728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:17,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939642847] [2021-07-13 20:46:17,562 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:17,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:46:17,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:17,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:46:17,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:46:17,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939642847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:17,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:17,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:46:17,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152854857] [2021-07-13 20:46:17,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:46:17,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:17,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:46:17,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:46:17,715 INFO L87 Difference]: Start difference. First operand 11108 states and 38506 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:19,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:19,608 INFO L93 Difference]: Finished difference Result 23782 states and 78083 transitions. [2021-07-13 20:46:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-13 20:46:19,608 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:19,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:19,660 INFO L225 Difference]: With dead ends: 23782 [2021-07-13 20:46:19,660 INFO L226 Difference]: Without dead ends: 23782 [2021-07-13 20:46:19,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4543 ImplicationChecksByTransitivity, 1283.6ms TimeCoverageRelationStatistics Valid=2343, Invalid=8999, Unknown=0, NotChecked=0, Total=11342 [2021-07-13 20:46:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23782 states. [2021-07-13 20:46:19,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23782 to 11414. [2021-07-13 20:46:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11414 states, 11413 states have (on average 3.453517918163498) internal successors, (39415), 11413 states have internal predecessors, (39415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11414 states to 11414 states and 39415 transitions. [2021-07-13 20:46:19,966 INFO L78 Accepts]: Start accepts. Automaton has 11414 states and 39415 transitions. Word has length 36 [2021-07-13 20:46:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:19,966 INFO L482 AbstractCegarLoop]: Abstraction has 11414 states and 39415 transitions. [2021-07-13 20:46:19,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 11414 states and 39415 transitions. [2021-07-13 20:46:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:19,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:19,983 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:20,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:20,184 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:20,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:20,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1278156332, now seen corresponding path program 84 times [2021-07-13 20:46:20,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:20,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630213575] [2021-07-13 20:46:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:20,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:20,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630213575] [2021-07-13 20:46:20,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630213575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:20,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328692813] [2021-07-13 20:46:20,259 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:20,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:46:20,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:20,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:46:20,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:20,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-13 20:46:20,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:20,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:20,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:20,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-07-13 20:46:20,504 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-07-13 20:46:20,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-07-13 20:46:20,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:20,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:20,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:20,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-13 20:46:20,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:20,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:20,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:20,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-07-13 20:46:20,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:20,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:20,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:46:20,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-07-13 20:46:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:46:20,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328692813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:20,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:20,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-13 20:46:20,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035484909] [2021-07-13 20:46:20,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:46:20,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:20,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:46:20,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:46:20,678 INFO L87 Difference]: Start difference. First operand 11414 states and 39415 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:25,291 INFO L93 Difference]: Finished difference Result 23675 states and 76434 transitions. [2021-07-13 20:46:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-07-13 20:46:25,292 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:25,341 INFO L225 Difference]: With dead ends: 23675 [2021-07-13 20:46:25,341 INFO L226 Difference]: Without dead ends: 23445 [2021-07-13 20:46:25,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12718 ImplicationChecksByTransitivity, 3371.2ms TimeCoverageRelationStatistics Valid=3502, Invalid=29078, Unknown=0, NotChecked=0, Total=32580 [2021-07-13 20:46:25,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23445 states. [2021-07-13 20:46:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23445 to 11648. [2021-07-13 20:46:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11648 states, 11647 states have (on average 3.4537649180046364) internal successors, (40226), 11647 states have internal predecessors, (40226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11648 states to 11648 states and 40226 transitions. [2021-07-13 20:46:25,676 INFO L78 Accepts]: Start accepts. Automaton has 11648 states and 40226 transitions. Word has length 36 [2021-07-13 20:46:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:25,676 INFO L482 AbstractCegarLoop]: Abstraction has 11648 states and 40226 transitions. [2021-07-13 20:46:25,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 11648 states and 40226 transitions. [2021-07-13 20:46:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:25,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:25,693 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:25,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:25,895 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:25,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1851612882, now seen corresponding path program 85 times [2021-07-13 20:46:25,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:25,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574846889] [2021-07-13 20:46:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:25,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:25,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574846889] [2021-07-13 20:46:25,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574846889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:25,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119300860] [2021-07-13 20:46:25,943 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:25,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:46:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:46:26,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119300860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:26,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:26,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:46:26,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274060720] [2021-07-13 20:46:26,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:46:26,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:26,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:46:26,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:46:26,086 INFO L87 Difference]: Start difference. First operand 11648 states and 40226 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:27,255 INFO L93 Difference]: Finished difference Result 21100 states and 70299 transitions. [2021-07-13 20:46:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:46:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:27,302 INFO L225 Difference]: With dead ends: 21100 [2021-07-13 20:46:27,302 INFO L226 Difference]: Without dead ends: 21088 [2021-07-13 20:46:27,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 707.6ms TimeCoverageRelationStatistics Valid=1148, Invalid=4858, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:46:27,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21088 states. [2021-07-13 20:46:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21088 to 11913. [2021-07-13 20:46:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11913 states, 11912 states have (on average 3.4548354600402953) internal successors, (41154), 11912 states have internal predecessors, (41154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11913 states to 11913 states and 41154 transitions. [2021-07-13 20:46:27,601 INFO L78 Accepts]: Start accepts. Automaton has 11913 states and 41154 transitions. Word has length 36 [2021-07-13 20:46:27,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:27,601 INFO L482 AbstractCegarLoop]: Abstraction has 11913 states and 41154 transitions. [2021-07-13 20:46:27,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 11913 states and 41154 transitions. [2021-07-13 20:46:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:27,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:27,618 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:27,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:27,819 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:27,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:27,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1819802944, now seen corresponding path program 25 times [2021-07-13 20:46:27,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:27,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654251731] [2021-07-13 20:46:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:46:27,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:27,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654251731] [2021-07-13 20:46:27,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654251731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:27,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131750728] [2021-07-13 20:46:27,861 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:27,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:46:27,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:28,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131750728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:28,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:28,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-07-13 20:46:28,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171060221] [2021-07-13 20:46:28,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:46:28,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:28,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:46:28,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:46:28,020 INFO L87 Difference]: Start difference. First operand 11913 states and 41154 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:29,116 INFO L93 Difference]: Finished difference Result 29397 states and 97752 transitions. [2021-07-13 20:46:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:46:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:29,187 INFO L225 Difference]: With dead ends: 29397 [2021-07-13 20:46:29,187 INFO L226 Difference]: Without dead ends: 29397 [2021-07-13 20:46:29,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=957, Invalid=2583, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:46:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29397 states. [2021-07-13 20:46:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29397 to 12618. [2021-07-13 20:46:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12618 states, 12617 states have (on average 3.513672029801062) internal successors, (44332), 12617 states have internal predecessors, (44332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12618 states to 12618 states and 44332 transitions. [2021-07-13 20:46:29,585 INFO L78 Accepts]: Start accepts. Automaton has 12618 states and 44332 transitions. Word has length 36 [2021-07-13 20:46:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:29,586 INFO L482 AbstractCegarLoop]: Abstraction has 12618 states and 44332 transitions. [2021-07-13 20:46:29,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 12618 states and 44332 transitions. [2021-07-13 20:46:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:29,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:29,606 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:29,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 20:46:29,807 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash 512328654, now seen corresponding path program 26 times [2021-07-13 20:46:29,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:29,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696160414] [2021-07-13 20:46:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:46:29,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:29,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696160414] [2021-07-13 20:46:29,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696160414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:29,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935971780] [2021-07-13 20:46:29,849 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:29,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:29,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:29,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:46:29,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:29,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935971780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:29,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:29,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-07-13 20:46:29,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14150100] [2021-07-13 20:46:29,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:46:29,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:29,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:46:29,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:46:29,996 INFO L87 Difference]: Start difference. First operand 12618 states and 44332 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:31,044 INFO L93 Difference]: Finished difference Result 27598 states and 91849 transitions. [2021-07-13 20:46:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:46:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:31,106 INFO L225 Difference]: With dead ends: 27598 [2021-07-13 20:46:31,106 INFO L226 Difference]: Without dead ends: 27598 [2021-07-13 20:46:31,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 594.0ms TimeCoverageRelationStatistics Valid=833, Invalid=2359, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:46:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27598 states. [2021-07-13 20:46:31,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27598 to 12630. [2021-07-13 20:46:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12630 states, 12629 states have (on average 3.5136590387204056) internal successors, (44374), 12629 states have internal predecessors, (44374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12630 states to 12630 states and 44374 transitions. [2021-07-13 20:46:31,474 INFO L78 Accepts]: Start accepts. Automaton has 12630 states and 44374 transitions. Word has length 36 [2021-07-13 20:46:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:31,474 INFO L482 AbstractCegarLoop]: Abstraction has 12630 states and 44374 transitions. [2021-07-13 20:46:31,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 12630 states and 44374 transitions. [2021-07-13 20:46:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:31,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:31,493 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:31,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 20:46:31,693 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:31,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:31,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2051604804, now seen corresponding path program 27 times [2021-07-13 20:46:31,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:31,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734665765] [2021-07-13 20:46:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:46:31,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:31,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734665765] [2021-07-13 20:46:31,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734665765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:31,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683251669] [2021-07-13 20:46:31,732 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:31,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:46:31,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:46:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:31,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683251669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:31,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:31,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-07-13 20:46:31,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622523259] [2021-07-13 20:46:31,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:46:31,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:31,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:46:31,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:46:31,884 INFO L87 Difference]: Start difference. First operand 12630 states and 44374 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:32,826 INFO L93 Difference]: Finished difference Result 27112 states and 90425 transitions. [2021-07-13 20:46:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:46:32,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:32,892 INFO L225 Difference]: With dead ends: 27112 [2021-07-13 20:46:32,892 INFO L226 Difference]: Without dead ends: 27108 [2021-07-13 20:46:32,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 475.9ms TimeCoverageRelationStatistics Valid=708, Invalid=2048, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:46:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27108 states. [2021-07-13 20:46:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27108 to 12826. [2021-07-13 20:46:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12826 states, 12825 states have (on average 3.504093567251462) internal successors, (44940), 12825 states have internal predecessors, (44940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12826 states to 12826 states and 44940 transitions. [2021-07-13 20:46:33,348 INFO L78 Accepts]: Start accepts. Automaton has 12826 states and 44940 transitions. Word has length 36 [2021-07-13 20:46:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:33,348 INFO L482 AbstractCegarLoop]: Abstraction has 12826 states and 44940 transitions. [2021-07-13 20:46:33,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 12826 states and 44940 transitions. [2021-07-13 20:46:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:33,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:33,370 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:33,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 20:46:33,571 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:33,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1246962008, now seen corresponding path program 28 times [2021-07-13 20:46:33,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:33,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326675566] [2021-07-13 20:46:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:33,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:33,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326675566] [2021-07-13 20:46:33,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326675566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:33,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482064031] [2021-07-13 20:46:33,621 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:33,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:33,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:33,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:46:33,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:33,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482064031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:33,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:33,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-07-13 20:46:33,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679451929] [2021-07-13 20:46:33,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:46:33,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:33,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:46:33,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:46:33,781 INFO L87 Difference]: Start difference. First operand 12826 states and 44940 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:34,828 INFO L93 Difference]: Finished difference Result 26778 states and 89284 transitions. [2021-07-13 20:46:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:46:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:34,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:34,893 INFO L225 Difference]: With dead ends: 26778 [2021-07-13 20:46:34,893 INFO L226 Difference]: Without dead ends: 26778 [2021-07-13 20:46:34,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=956, Invalid=2704, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:46:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26778 states. [2021-07-13 20:46:35,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26778 to 12913. [2021-07-13 20:46:35,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12913 states, 12912 states have (on average 3.5164188351920695) internal successors, (45404), 12912 states have internal predecessors, (45404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12913 states to 12913 states and 45404 transitions. [2021-07-13 20:46:35,290 INFO L78 Accepts]: Start accepts. Automaton has 12913 states and 45404 transitions. Word has length 36 [2021-07-13 20:46:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:35,290 INFO L482 AbstractCegarLoop]: Abstraction has 12913 states and 45404 transitions. [2021-07-13 20:46:35,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:35,290 INFO L276 IsEmpty]: Start isEmpty. Operand 12913 states and 45404 transitions. [2021-07-13 20:46:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:35,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:35,388 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:35,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 20:46:35,588 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:35,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:35,589 INFO L82 PathProgramCache]: Analyzing trace with hash 680135048, now seen corresponding path program 29 times [2021-07-13 20:46:35,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:35,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967394516] [2021-07-13 20:46:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:35,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:35,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967394516] [2021-07-13 20:46:35,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967394516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:35,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385323026] [2021-07-13 20:46:35,634 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:35,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:46:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:35,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:46:35,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:46:35,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385323026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:35,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:35,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 20:46:35,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545004256] [2021-07-13 20:46:35,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:46:35,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:35,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:46:35,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:46:35,816 INFO L87 Difference]: Start difference. First operand 12913 states and 45404 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:40,031 INFO L93 Difference]: Finished difference Result 28407 states and 94171 transitions. [2021-07-13 20:46:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-07-13 20:46:40,031 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:40,094 INFO L225 Difference]: With dead ends: 28407 [2021-07-13 20:46:40,094 INFO L226 Difference]: Without dead ends: 28387 [2021-07-13 20:46:40,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18300 ImplicationChecksByTransitivity, 3140.7ms TimeCoverageRelationStatistics Valid=7298, Invalid=36174, Unknown=0, NotChecked=0, Total=43472 [2021-07-13 20:46:40,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28387 states. [2021-07-13 20:46:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28387 to 13021. [2021-07-13 20:46:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13021 states, 13020 states have (on average 3.526804915514593) internal successors, (45919), 13020 states have internal predecessors, (45919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13021 states to 13021 states and 45919 transitions. [2021-07-13 20:46:40,524 INFO L78 Accepts]: Start accepts. Automaton has 13021 states and 45919 transitions. Word has length 36 [2021-07-13 20:46:40,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:40,525 INFO L482 AbstractCegarLoop]: Abstraction has 13021 states and 45919 transitions. [2021-07-13 20:46:40,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 13021 states and 45919 transitions. [2021-07-13 20:46:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:40,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:40,546 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:40,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:40,746 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:40,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:40,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1847708024, now seen corresponding path program 30 times [2021-07-13 20:46:40,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:40,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015862817] [2021-07-13 20:46:40,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:40,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:40,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015862817] [2021-07-13 20:46:40,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015862817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:40,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030090945] [2021-07-13 20:46:40,800 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:40,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:46:40,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:46:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:40,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-13 20:46:40,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:40,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:40,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:40,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-07-13 20:46:41,002 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-07-13 20:46:41,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-07-13 20:46:41,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:41,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:41,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:41,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-13 20:46:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:41,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:41,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-07-13 20:46:41,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:41,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:41,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:46:41,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-07-13 20:46:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:46:41,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030090945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:41,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:41,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-13 20:46:41,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822598291] [2021-07-13 20:46:41,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:46:41,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:41,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:46:41,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:46:41,162 INFO L87 Difference]: Start difference. First operand 13021 states and 45919 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:45,473 INFO L93 Difference]: Finished difference Result 25162 states and 83066 transitions. [2021-07-13 20:46:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-07-13 20:46:45,473 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:45,530 INFO L225 Difference]: With dead ends: 25162 [2021-07-13 20:46:45,530 INFO L226 Difference]: Without dead ends: 24983 [2021-07-13 20:46:45,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13764 ImplicationChecksByTransitivity, 3118.3ms TimeCoverageRelationStatistics Valid=4792, Invalid=29248, Unknown=0, NotChecked=0, Total=34040 [2021-07-13 20:46:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24983 states. [2021-07-13 20:46:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24983 to 13428. [2021-07-13 20:46:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13428 states, 13427 states have (on average 3.5044313696283607) internal successors, (47054), 13427 states have internal predecessors, (47054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13428 states to 13428 states and 47054 transitions. [2021-07-13 20:46:45,881 INFO L78 Accepts]: Start accepts. Automaton has 13428 states and 47054 transitions. Word has length 36 [2021-07-13 20:46:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:45,881 INFO L482 AbstractCegarLoop]: Abstraction has 13428 states and 47054 transitions. [2021-07-13 20:46:45,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 13428 states and 47054 transitions. [2021-07-13 20:46:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:45,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:45,902 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:46,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 20:46:46,102 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:46,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1284231232, now seen corresponding path program 86 times [2021-07-13 20:46:46,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:46,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075355428] [2021-07-13 20:46:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:46,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:46,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075355428] [2021-07-13 20:46:46,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075355428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:46,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916008187] [2021-07-13 20:46:46,154 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:46,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:46,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:46,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:46:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:46:46,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916008187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:46,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:46,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 20:46:46,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887152922] [2021-07-13 20:46:46,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:46:46,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:46,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:46:46,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:46:46,301 INFO L87 Difference]: Start difference. First operand 13428 states and 47054 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:47,080 INFO L93 Difference]: Finished difference Result 24409 states and 81988 transitions. [2021-07-13 20:46:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:46:47,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:47,134 INFO L225 Difference]: With dead ends: 24409 [2021-07-13 20:46:47,134 INFO L226 Difference]: Without dead ends: 24409 [2021-07-13 20:46:47,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=614, Invalid=1836, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:46:47,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24409 states. [2021-07-13 20:46:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24409 to 13273. [2021-07-13 20:46:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13273 states, 13272 states have (on average 3.4954792043399636) internal successors, (46392), 13272 states have internal predecessors, (46392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13273 states to 13273 states and 46392 transitions. [2021-07-13 20:46:47,567 INFO L78 Accepts]: Start accepts. Automaton has 13273 states and 46392 transitions. Word has length 36 [2021-07-13 20:46:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:47,567 INFO L482 AbstractCegarLoop]: Abstraction has 13273 states and 46392 transitions. [2021-07-13 20:46:47,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 13273 states and 46392 transitions. [2021-07-13 20:46:47,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:47,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:47,588 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:47,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:47,789 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:47,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2050547776, now seen corresponding path program 87 times [2021-07-13 20:46:47,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:47,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640125816] [2021-07-13 20:46:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:47,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:47,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640125816] [2021-07-13 20:46:47,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640125816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:47,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958862133] [2021-07-13 20:46:47,836 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:47,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:46:47,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:47,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:46:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:46:47,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958862133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:47,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:47,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-13 20:46:47,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14589883] [2021-07-13 20:46:47,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:46:47,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:47,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:46:47,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:46:47,967 INFO L87 Difference]: Start difference. First operand 13273 states and 46392 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:48,488 INFO L93 Difference]: Finished difference Result 23775 states and 80054 transitions. [2021-07-13 20:46:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:46:48,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:48,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:48,538 INFO L225 Difference]: With dead ends: 23775 [2021-07-13 20:46:48,538 INFO L226 Difference]: Without dead ends: 23775 [2021-07-13 20:46:48,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:46:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23775 states. [2021-07-13 20:46:48,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23775 to 13214. [2021-07-13 20:46:48,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13214 states, 13213 states have (on average 3.4921668054189055) internal successors, (46142), 13213 states have internal predecessors, (46142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:48,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13214 states to 13214 states and 46142 transitions. [2021-07-13 20:46:48,900 INFO L78 Accepts]: Start accepts. Automaton has 13214 states and 46142 transitions. Word has length 36 [2021-07-13 20:46:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:48,900 INFO L482 AbstractCegarLoop]: Abstraction has 13214 states and 46142 transitions. [2021-07-13 20:46:48,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 13214 states and 46142 transitions. [2021-07-13 20:46:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:48,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:48,921 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:49,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 20:46:49,122 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:49,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:49,122 INFO L82 PathProgramCache]: Analyzing trace with hash 281583822, now seen corresponding path program 88 times [2021-07-13 20:46:49,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:49,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433959197] [2021-07-13 20:46:49,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:49,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:49,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433959197] [2021-07-13 20:46:49,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433959197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:49,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228235298] [2021-07-13 20:46:49,176 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:49,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:49,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:49,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:46:49,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:46:49,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228235298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:49,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:49,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-07-13 20:46:49,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523898573] [2021-07-13 20:46:49,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:49,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:49,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:49,301 INFO L87 Difference]: Start difference. First operand 13214 states and 46142 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:49,833 INFO L93 Difference]: Finished difference Result 23327 states and 78114 transitions. [2021-07-13 20:46:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:46:49,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:49,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:49,883 INFO L225 Difference]: With dead ends: 23327 [2021-07-13 20:46:49,883 INFO L226 Difference]: Without dead ends: 23327 [2021-07-13 20:46:49,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:46:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23327 states. [2021-07-13 20:46:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23327 to 13240. [2021-07-13 20:46:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13240 states, 13239 states have (on average 3.4912757761160207) internal successors, (46221), 13239 states have internal predecessors, (46221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13240 states to 13240 states and 46221 transitions. [2021-07-13 20:46:50,242 INFO L78 Accepts]: Start accepts. Automaton has 13240 states and 46221 transitions. Word has length 36 [2021-07-13 20:46:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:50,242 INFO L482 AbstractCegarLoop]: Abstraction has 13240 states and 46221 transitions. [2021-07-13 20:46:50,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 13240 states and 46221 transitions. [2021-07-13 20:46:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:50,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:50,263 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:50,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-07-13 20:46:50,463 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:50,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2012617660, now seen corresponding path program 89 times [2021-07-13 20:46:50,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:50,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243070123] [2021-07-13 20:46:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:50,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:50,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243070123] [2021-07-13 20:46:50,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243070123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:50,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459878379] [2021-07-13 20:46:50,534 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:50,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:46:50,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:50,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:46:50,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:46:50,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459878379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:50,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:50,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:46:50,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622974447] [2021-07-13 20:46:50,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:46:50,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:50,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:46:50,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:46:50,672 INFO L87 Difference]: Start difference. First operand 13240 states and 46221 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:52,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:52,139 INFO L93 Difference]: Finished difference Result 26376 states and 86731 transitions. [2021-07-13 20:46:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-13 20:46:52,140 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:52,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:52,276 INFO L225 Difference]: With dead ends: 26376 [2021-07-13 20:46:52,276 INFO L226 Difference]: Without dead ends: 26364 [2021-07-13 20:46:52,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=1623, Invalid=6387, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:46:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26364 states. [2021-07-13 20:46:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26364 to 13310. [2021-07-13 20:46:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13310 states, 13309 states have (on average 3.4776467052370577) internal successors, (46284), 13309 states have internal predecessors, (46284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13310 states to 13310 states and 46284 transitions. [2021-07-13 20:46:52,646 INFO L78 Accepts]: Start accepts. Automaton has 13310 states and 46284 transitions. Word has length 36 [2021-07-13 20:46:52,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:52,646 INFO L482 AbstractCegarLoop]: Abstraction has 13310 states and 46284 transitions. [2021-07-13 20:46:52,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:52,647 INFO L276 IsEmpty]: Start isEmpty. Operand 13310 states and 46284 transitions. [2021-07-13 20:46:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:52,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:52,668 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:52,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:52,869 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:52,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1239534524, now seen corresponding path program 90 times [2021-07-13 20:46:52,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:52,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563737207] [2021-07-13 20:46:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:52,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:52,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563737207] [2021-07-13 20:46:52,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563737207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:52,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621723048] [2021-07-13 20:46:52,914 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:52,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:46:52,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:52,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:46:52,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:46:53,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621723048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:53,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:53,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-13 20:46:53,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050691061] [2021-07-13 20:46:53,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:46:53,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:53,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:46:53,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:46:53,023 INFO L87 Difference]: Start difference. First operand 13310 states and 46284 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:53,881 INFO L93 Difference]: Finished difference Result 26781 states and 88963 transitions. [2021-07-13 20:46:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:46:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:53,943 INFO L225 Difference]: With dead ends: 26781 [2021-07-13 20:46:53,943 INFO L226 Difference]: Without dead ends: 26737 [2021-07-13 20:46:53,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:46:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26737 states. [2021-07-13 20:46:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26737 to 13708. [2021-07-13 20:46:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13708 states, 13707 states have (on average 3.4510104326256656) internal successors, (47303), 13707 states have internal predecessors, (47303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13708 states to 13708 states and 47303 transitions. [2021-07-13 20:46:54,378 INFO L78 Accepts]: Start accepts. Automaton has 13708 states and 47303 transitions. Word has length 36 [2021-07-13 20:46:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:54,378 INFO L482 AbstractCegarLoop]: Abstraction has 13708 states and 47303 transitions. [2021-07-13 20:46:54,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 13708 states and 47303 transitions. [2021-07-13 20:46:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:54,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:54,400 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:54,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:54,600 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:54,600 INFO L82 PathProgramCache]: Analyzing trace with hash 790366380, now seen corresponding path program 91 times [2021-07-13 20:46:54,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:54,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613730894] [2021-07-13 20:46:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:54,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:54,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613730894] [2021-07-13 20:46:54,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613730894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:54,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096440499] [2021-07-13 20:46:54,659 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:54,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:46:54,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:46:54,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096440499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:54,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:54,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-07-13 20:46:54,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023940028] [2021-07-13 20:46:54,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:54,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:54,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:54,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:54,779 INFO L87 Difference]: Start difference. First operand 13708 states and 47303 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:55,486 INFO L93 Difference]: Finished difference Result 26715 states and 87686 transitions. [2021-07-13 20:46:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:46:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:55,546 INFO L225 Difference]: With dead ends: 26715 [2021-07-13 20:46:55,546 INFO L226 Difference]: Without dead ends: 26715 [2021-07-13 20:46:55,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:46:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26715 states. [2021-07-13 20:46:55,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26715 to 14801. [2021-07-13 20:46:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14801 states, 14800 states have (on average 3.4525675675675678) internal successors, (51098), 14800 states have internal predecessors, (51098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14801 states to 14801 states and 51098 transitions. [2021-07-13 20:46:55,956 INFO L78 Accepts]: Start accepts. Automaton has 14801 states and 51098 transitions. Word has length 36 [2021-07-13 20:46:55,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:55,956 INFO L482 AbstractCegarLoop]: Abstraction has 14801 states and 51098 transitions. [2021-07-13 20:46:55,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 14801 states and 51098 transitions. [2021-07-13 20:46:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:56,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:56,067 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:56,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 20:46:56,268 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:56,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2078452856, now seen corresponding path program 92 times [2021-07-13 20:46:56,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:56,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460587960] [2021-07-13 20:46:56,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:56,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:56,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460587960] [2021-07-13 20:46:56,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460587960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:56,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441792380] [2021-07-13 20:46:56,324 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:56,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:56,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:56,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:46:56,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:46:56,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441792380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:56,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:56,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-13 20:46:56,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508451480] [2021-07-13 20:46:56,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:56,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:56,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:56,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:56,434 INFO L87 Difference]: Start difference. First operand 14801 states and 51098 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:57,422 INFO L93 Difference]: Finished difference Result 26862 states and 89241 transitions. [2021-07-13 20:46:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:46:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:57,485 INFO L225 Difference]: With dead ends: 26862 [2021-07-13 20:46:57,485 INFO L226 Difference]: Without dead ends: 26794 [2021-07-13 20:46:57,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=916, Invalid=3640, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:46:57,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26794 states. [2021-07-13 20:46:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26794 to 14135. [2021-07-13 20:46:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14135 states, 14134 states have (on average 3.475944530918353) internal successors, (49129), 14134 states have internal predecessors, (49129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14135 states to 14135 states and 49129 transitions. [2021-07-13 20:46:57,885 INFO L78 Accepts]: Start accepts. Automaton has 14135 states and 49129 transitions. Word has length 36 [2021-07-13 20:46:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:57,885 INFO L482 AbstractCegarLoop]: Abstraction has 14135 states and 49129 transitions. [2021-07-13 20:46:57,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 14135 states and 49129 transitions. [2021-07-13 20:46:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:57,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:57,907 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:58,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:58,108 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:58,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1434655568, now seen corresponding path program 93 times [2021-07-13 20:46:58,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:58,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199294957] [2021-07-13 20:46:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:58,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:58,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199294957] [2021-07-13 20:46:58,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199294957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:58,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704134918] [2021-07-13 20:46:58,166 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:58,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:46:58,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:58,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:46:58,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:58,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704134918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:58,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:58,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-07-13 20:46:58,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915594331] [2021-07-13 20:46:58,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:46:58,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:46:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:46:58,287 INFO L87 Difference]: Start difference. First operand 14135 states and 49129 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:59,213 INFO L93 Difference]: Finished difference Result 25932 states and 85483 transitions. [2021-07-13 20:46:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:46:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:46:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:59,274 INFO L225 Difference]: With dead ends: 25932 [2021-07-13 20:46:59,274 INFO L226 Difference]: Without dead ends: 25932 [2021-07-13 20:46:59,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:46:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25932 states. [2021-07-13 20:46:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25932 to 14667. [2021-07-13 20:46:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14667 states, 14666 states have (on average 3.455407063957453) internal successors, (50677), 14666 states have internal predecessors, (50677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14667 states to 14667 states and 50677 transitions. [2021-07-13 20:46:59,687 INFO L78 Accepts]: Start accepts. Automaton has 14667 states and 50677 transitions. Word has length 36 [2021-07-13 20:46:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:59,687 INFO L482 AbstractCegarLoop]: Abstraction has 14667 states and 50677 transitions. [2021-07-13 20:46:59,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 14667 states and 50677 transitions. [2021-07-13 20:46:59,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:46:59,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:59,710 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:59,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 20:46:59,911 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:59,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:59,911 INFO L82 PathProgramCache]: Analyzing trace with hash 296378270, now seen corresponding path program 94 times [2021-07-13 20:46:59,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:59,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298257528] [2021-07-13 20:46:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:59,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:59,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298257528] [2021-07-13 20:46:59,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298257528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:59,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868921407] [2021-07-13 20:46:59,972 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:59,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:59,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:59,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:47:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:47:00,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868921407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:00,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:00,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-13 20:47:00,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574099648] [2021-07-13 20:47:00,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:00,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:00,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:00,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:00,095 INFO L87 Difference]: Start difference. First operand 14667 states and 50677 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:01,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:01,804 INFO L93 Difference]: Finished difference Result 27978 states and 91670 transitions. [2021-07-13 20:47:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-13 20:47:01,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:01,869 INFO L225 Difference]: With dead ends: 27978 [2021-07-13 20:47:01,870 INFO L226 Difference]: Without dead ends: 27978 [2021-07-13 20:47:01,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5435 ImplicationChecksByTransitivity, 1125.0ms TimeCoverageRelationStatistics Valid=2370, Invalid=10740, Unknown=0, NotChecked=0, Total=13110 [2021-07-13 20:47:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27978 states. [2021-07-13 20:47:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27978 to 13839. [2021-07-13 20:47:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13839 states, 13838 states have (on average 3.4976875270992918) internal successors, (48401), 13838 states have internal predecessors, (48401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 48401 transitions. [2021-07-13 20:47:02,273 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 48401 transitions. Word has length 36 [2021-07-13 20:47:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:02,274 INFO L482 AbstractCegarLoop]: Abstraction has 13839 states and 48401 transitions. [2021-07-13 20:47:02,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 48401 transitions. [2021-07-13 20:47:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:02,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:02,296 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:02,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 20:47:02,496 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:02,497 INFO L82 PathProgramCache]: Analyzing trace with hash -384155512, now seen corresponding path program 95 times [2021-07-13 20:47:02,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:02,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017752552] [2021-07-13 20:47:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:02,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:02,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017752552] [2021-07-13 20:47:02,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017752552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:02,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669686264] [2021-07-13 20:47:02,559 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:02,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:47:02,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:02,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:47:02,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:02,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669686264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:02,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:02,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-07-13 20:47:02,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184794196] [2021-07-13 20:47:02,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:02,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:02,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:02,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:02,681 INFO L87 Difference]: Start difference. First operand 13839 states and 48401 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:03,971 INFO L93 Difference]: Finished difference Result 26069 states and 86821 transitions. [2021-07-13 20:47:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:47:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:04,044 INFO L225 Difference]: With dead ends: 26069 [2021-07-13 20:47:04,045 INFO L226 Difference]: Without dead ends: 25977 [2021-07-13 20:47:04,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 756.4ms TimeCoverageRelationStatistics Valid=1207, Invalid=5435, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:47:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25977 states. [2021-07-13 20:47:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25977 to 14407. [2021-07-13 20:47:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14407 states, 14406 states have (on average 3.470637234485631) internal successors, (49998), 14406 states have internal predecessors, (49998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14407 states to 14407 states and 49998 transitions. [2021-07-13 20:47:04,443 INFO L78 Accepts]: Start accepts. Automaton has 14407 states and 49998 transitions. Word has length 36 [2021-07-13 20:47:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:04,443 INFO L482 AbstractCegarLoop]: Abstraction has 14407 states and 49998 transitions. [2021-07-13 20:47:04,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 14407 states and 49998 transitions. [2021-07-13 20:47:04,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:04,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:04,466 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:04,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 20:47:04,667 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:04,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1269898876, now seen corresponding path program 96 times [2021-07-13 20:47:04,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:04,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893140131] [2021-07-13 20:47:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:04,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:04,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893140131] [2021-07-13 20:47:04,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893140131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:04,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894545756] [2021-07-13 20:47:04,720 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:04,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:47:04,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:04,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:47:04,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:04,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-13 20:47:04,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:04,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:04,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:04,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-07-13 20:47:04,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:04,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-07-13 20:47:04,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:04,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:04,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:04,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-07-13 20:47:04,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:04,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:04,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:04,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2021-07-13 20:47:04,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:04,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:04,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:47:04,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:38 [2021-07-13 20:47:04,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:04,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:04,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-07-13 20:47:04,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:04,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:04,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:47:04,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2021-07-13 20:47:05,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:05,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:05,039 INFO L354 Elim1Store]: treesize reduction 48, result has 25.0 percent of original size [2021-07-13 20:47:05,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:47:05,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:05,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:05,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:47:05,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-07-13 20:47:05,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:05,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:05,132 INFO L354 Elim1Store]: treesize reduction 88, result has 19.3 percent of original size [2021-07-13 20:47:05,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 37 treesize of output 48 [2021-07-13 20:47:05,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:05,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:05,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:47:05,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:58 [2021-07-13 20:47:05,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:05,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:05,281 INFO L354 Elim1Store]: treesize reduction 136, result has 16.0 percent of original size [2021-07-13 20:47:05,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 58 [2021-07-13 20:47:05,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:05,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:05,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:47:05,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:70 [2021-07-13 20:47:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:05,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894545756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:05,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:05,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-13 20:47:05,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968170244] [2021-07-13 20:47:05,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:47:05,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:05,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:47:05,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:47:05,472 INFO L87 Difference]: Start difference. First operand 14407 states and 49998 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:08,197 INFO L93 Difference]: Finished difference Result 19437 states and 64480 transitions. [2021-07-13 20:47:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:47:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:08,242 INFO L225 Difference]: With dead ends: 19437 [2021-07-13 20:47:08,243 INFO L226 Difference]: Without dead ends: 19021 [2021-07-13 20:47:08,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1746.5ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:47:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-07-13 20:47:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 15957. [2021-07-13 20:47:08,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15957 states, 15956 states have (on average 3.4367009275507647) internal successors, (54836), 15956 states have internal predecessors, (54836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15957 states to 15957 states and 54836 transitions. [2021-07-13 20:47:08,600 INFO L78 Accepts]: Start accepts. Automaton has 15957 states and 54836 transitions. Word has length 36 [2021-07-13 20:47:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:08,600 INFO L482 AbstractCegarLoop]: Abstraction has 15957 states and 54836 transitions. [2021-07-13 20:47:08,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 15957 states and 54836 transitions. [2021-07-13 20:47:08,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:08,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:08,624 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:08,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:08,826 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:08,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:08,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1525571952, now seen corresponding path program 97 times [2021-07-13 20:47:08,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:08,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718931174] [2021-07-13 20:47:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:08,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:08,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718931174] [2021-07-13 20:47:08,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718931174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:08,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968271441] [2021-07-13 20:47:08,886 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:08,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:47:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:09,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968271441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:09,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:09,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:47:09,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408028572] [2021-07-13 20:47:09,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:47:09,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:47:09,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:47:09,124 INFO L87 Difference]: Start difference. First operand 15957 states and 54836 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:10,391 INFO L93 Difference]: Finished difference Result 31024 states and 101059 transitions. [2021-07-13 20:47:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:47:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:10,462 INFO L225 Difference]: With dead ends: 31024 [2021-07-13 20:47:10,463 INFO L226 Difference]: Without dead ends: 31024 [2021-07-13 20:47:10,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 886.9ms TimeCoverageRelationStatistics Valid=1344, Invalid=3912, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:47:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31024 states. [2021-07-13 20:47:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31024 to 16979. [2021-07-13 20:47:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16979 states, 16978 states have (on average 3.408234185416421) internal successors, (57865), 16978 states have internal predecessors, (57865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16979 states to 16979 states and 57865 transitions. [2021-07-13 20:47:10,945 INFO L78 Accepts]: Start accepts. Automaton has 16979 states and 57865 transitions. Word has length 36 [2021-07-13 20:47:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:10,945 INFO L482 AbstractCegarLoop]: Abstraction has 16979 states and 57865 transitions. [2021-07-13 20:47:10,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 16979 states and 57865 transitions. [2021-07-13 20:47:11,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:11,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:11,053 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:11,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 20:47:11,253 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:11,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:11,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1354812750, now seen corresponding path program 98 times [2021-07-13 20:47:11,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:11,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707859902] [2021-07-13 20:47:11,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:11,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:11,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707859902] [2021-07-13 20:47:11,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707859902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:11,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483129025] [2021-07-13 20:47:11,310 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:11,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:11,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:11,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:47:11,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:47:11,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483129025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:11,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:11,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:47:11,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503582960] [2021-07-13 20:47:11,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:47:11,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:11,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:47:11,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:47:11,480 INFO L87 Difference]: Start difference. First operand 16979 states and 57865 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:13,965 INFO L93 Difference]: Finished difference Result 33282 states and 107796 transitions. [2021-07-13 20:47:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-07-13 20:47:13,965 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:14,044 INFO L225 Difference]: With dead ends: 33282 [2021-07-13 20:47:14,044 INFO L226 Difference]: Without dead ends: 33254 [2021-07-13 20:47:14,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7204 ImplicationChecksByTransitivity, 1698.9ms TimeCoverageRelationStatistics Valid=3502, Invalid=14320, Unknown=0, NotChecked=0, Total=17822 [2021-07-13 20:47:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33254 states. [2021-07-13 20:47:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33254 to 16803. [2021-07-13 20:47:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16803 states, 16802 states have (on average 3.411082014045947) internal successors, (57313), 16802 states have internal predecessors, (57313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 57313 transitions. [2021-07-13 20:47:14,594 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 57313 transitions. Word has length 36 [2021-07-13 20:47:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:14,594 INFO L482 AbstractCegarLoop]: Abstraction has 16803 states and 57313 transitions. [2021-07-13 20:47:14,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 57313 transitions. [2021-07-13 20:47:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:14,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:14,620 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:14,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 20:47:14,821 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:14,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2057609742, now seen corresponding path program 99 times [2021-07-13 20:47:14,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:14,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941737885] [2021-07-13 20:47:14,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:14,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:14,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941737885] [2021-07-13 20:47:14,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941737885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:14,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261297039] [2021-07-13 20:47:14,874 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:14,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:47:14,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:14,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:47:14,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:15,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261297039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:15,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:15,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-13 20:47:15,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064466224] [2021-07-13 20:47:15,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:15,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:15,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:15,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:15,014 INFO L87 Difference]: Start difference. First operand 16803 states and 57313 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:16,534 INFO L93 Difference]: Finished difference Result 30475 states and 100578 transitions. [2021-07-13 20:47:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 20:47:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:16,601 INFO L225 Difference]: With dead ends: 30475 [2021-07-13 20:47:16,602 INFO L226 Difference]: Without dead ends: 30411 [2021-07-13 20:47:16,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=1678, Invalid=5978, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:47:16,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30411 states. [2021-07-13 20:47:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30411 to 16624. [2021-07-13 20:47:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16624 states, 16623 states have (on average 3.411417914937135) internal successors, (56708), 16623 states have internal predecessors, (56708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:17,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16624 states to 16624 states and 56708 transitions. [2021-07-13 20:47:17,017 INFO L78 Accepts]: Start accepts. Automaton has 16624 states and 56708 transitions. Word has length 36 [2021-07-13 20:47:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:17,017 INFO L482 AbstractCegarLoop]: Abstraction has 16624 states and 56708 transitions. [2021-07-13 20:47:17,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 16624 states and 56708 transitions. [2021-07-13 20:47:17,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:17,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:17,043 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:17,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:17,243 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1448352448, now seen corresponding path program 100 times [2021-07-13 20:47:17,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:17,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284692953] [2021-07-13 20:47:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:17,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:17,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284692953] [2021-07-13 20:47:17,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284692953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:17,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145787313] [2021-07-13 20:47:17,298 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:17,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:17,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:17,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:47:17,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:17,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145787313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:17,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:17,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:47:17,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176327621] [2021-07-13 20:47:17,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:47:17,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:17,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:47:17,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:47:17,452 INFO L87 Difference]: Start difference. First operand 16624 states and 56708 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:18,545 INFO L93 Difference]: Finished difference Result 32379 states and 105054 transitions. [2021-07-13 20:47:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:47:18,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:18,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:18,632 INFO L225 Difference]: With dead ends: 32379 [2021-07-13 20:47:18,632 INFO L226 Difference]: Without dead ends: 32379 [2021-07-13 20:47:18,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 549.4ms TimeCoverageRelationStatistics Valid=832, Invalid=2360, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:47:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32379 states. [2021-07-13 20:47:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32379 to 17402. [2021-07-13 20:47:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17402 states, 17401 states have (on average 3.3985977817366817) internal successors, (59139), 17401 states have internal predecessors, (59139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17402 states to 17402 states and 59139 transitions. [2021-07-13 20:47:19,239 INFO L78 Accepts]: Start accepts. Automaton has 17402 states and 59139 transitions. Word has length 36 [2021-07-13 20:47:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:19,239 INFO L482 AbstractCegarLoop]: Abstraction has 17402 states and 59139 transitions. [2021-07-13 20:47:19,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 17402 states and 59139 transitions. [2021-07-13 20:47:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:19,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:19,271 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:19,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:19,472 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:19,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1791237454, now seen corresponding path program 101 times [2021-07-13 20:47:19,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:19,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726036708] [2021-07-13 20:47:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:19,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:19,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726036708] [2021-07-13 20:47:19,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726036708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:19,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770784756] [2021-07-13 20:47:19,531 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:19,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:47:19,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:19,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:47:19,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:19,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770784756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:19,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:19,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:47:19,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183983294] [2021-07-13 20:47:19,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:47:19,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:19,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:47:19,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:47:19,697 INFO L87 Difference]: Start difference. First operand 17402 states and 59139 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:20,738 INFO L93 Difference]: Finished difference Result 31791 states and 103499 transitions. [2021-07-13 20:47:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:47:20,739 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:20,837 INFO L225 Difference]: With dead ends: 31791 [2021-07-13 20:47:20,837 INFO L226 Difference]: Without dead ends: 31779 [2021-07-13 20:47:20,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:47:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31779 states. [2021-07-13 20:47:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31779 to 17354. [2021-07-13 20:47:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17354 states, 17353 states have (on average 3.3990088169192645) internal successors, (58983), 17353 states have internal predecessors, (58983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17354 states to 17354 states and 58983 transitions. [2021-07-13 20:47:21,551 INFO L78 Accepts]: Start accepts. Automaton has 17354 states and 58983 transitions. Word has length 36 [2021-07-13 20:47:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:21,551 INFO L482 AbstractCegarLoop]: Abstraction has 17354 states and 58983 transitions. [2021-07-13 20:47:21,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:21,551 INFO L276 IsEmpty]: Start isEmpty. Operand 17354 states and 58983 transitions. [2021-07-13 20:47:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:21,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:21,583 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:21,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:21,784 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1020594904, now seen corresponding path program 102 times [2021-07-13 20:47:21,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:21,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512357064] [2021-07-13 20:47:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:21,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:21,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512357064] [2021-07-13 20:47:21,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512357064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:21,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740383366] [2021-07-13 20:47:21,846 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:21,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:47:21,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:21,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:47:21,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:47:22,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740383366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:22,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:22,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-13 20:47:22,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187045051] [2021-07-13 20:47:22,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:47:22,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:22,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:47:22,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:47:22,008 INFO L87 Difference]: Start difference. First operand 17354 states and 58983 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:25,518 INFO L93 Difference]: Finished difference Result 32845 states and 106582 transitions. [2021-07-13 20:47:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-07-13 20:47:25,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:25,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:25,595 INFO L225 Difference]: With dead ends: 32845 [2021-07-13 20:47:25,596 INFO L226 Difference]: Without dead ends: 32825 [2021-07-13 20:47:25,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11588 ImplicationChecksByTransitivity, 2491.6ms TimeCoverageRelationStatistics Valid=4603, Invalid=23453, Unknown=0, NotChecked=0, Total=28056 [2021-07-13 20:47:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32825 states. [2021-07-13 20:47:26,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32825 to 17254. [2021-07-13 20:47:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17254 states, 17253 states have (on average 3.4028284935953166) internal successors, (58709), 17253 states have internal predecessors, (58709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17254 states to 17254 states and 58709 transitions. [2021-07-13 20:47:26,115 INFO L78 Accepts]: Start accepts. Automaton has 17254 states and 58709 transitions. Word has length 36 [2021-07-13 20:47:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:26,115 INFO L482 AbstractCegarLoop]: Abstraction has 17254 states and 58709 transitions. [2021-07-13 20:47:26,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 17254 states and 58709 transitions. [2021-07-13 20:47:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:26,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:26,141 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:26,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-13 20:47:26,342 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:26,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:26,342 INFO L82 PathProgramCache]: Analyzing trace with hash 590890608, now seen corresponding path program 103 times [2021-07-13 20:47:26,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:26,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207027061] [2021-07-13 20:47:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:47:26,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:26,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207027061] [2021-07-13 20:47:26,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207027061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:26,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802793397] [2021-07-13 20:47:26,397 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:47:26,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:26,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802793397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:26,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:26,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:47:26,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569227059] [2021-07-13 20:47:26,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:26,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:26,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:26,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:26,563 INFO L87 Difference]: Start difference. First operand 17254 states and 58709 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:27,431 INFO L93 Difference]: Finished difference Result 36771 states and 121891 transitions. [2021-07-13 20:47:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:47:27,431 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:27,542 INFO L225 Difference]: With dead ends: 36771 [2021-07-13 20:47:27,542 INFO L226 Difference]: Without dead ends: 36771 [2021-07-13 20:47:27,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:47:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36771 states. [2021-07-13 20:47:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36771 to 17615. [2021-07-13 20:47:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17615 states, 17614 states have (on average 3.421653230384921) internal successors, (60269), 17614 states have internal predecessors, (60269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17615 states to 17615 states and 60269 transitions. [2021-07-13 20:47:28,242 INFO L78 Accepts]: Start accepts. Automaton has 17615 states and 60269 transitions. Word has length 36 [2021-07-13 20:47:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:28,242 INFO L482 AbstractCegarLoop]: Abstraction has 17615 states and 60269 transitions. [2021-07-13 20:47:28,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 17615 states and 60269 transitions. [2021-07-13 20:47:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:28,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:28,274 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:28,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 20:47:28,475 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:28,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:28,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1255821764, now seen corresponding path program 104 times [2021-07-13 20:47:28,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:28,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181260451] [2021-07-13 20:47:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:28,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:28,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181260451] [2021-07-13 20:47:28,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181260451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:28,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816929604] [2021-07-13 20:47:28,551 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:28,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:28,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:28,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:47:28,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:47:28,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816929604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:28,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:28,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-13 20:47:28,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801239700] [2021-07-13 20:47:28,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:47:28,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:28,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:47:28,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:47:28,751 INFO L87 Difference]: Start difference. First operand 17615 states and 60269 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:31,880 INFO L93 Difference]: Finished difference Result 43448 states and 142049 transitions. [2021-07-13 20:47:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-07-13 20:47:31,880 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:31,986 INFO L225 Difference]: With dead ends: 43448 [2021-07-13 20:47:31,986 INFO L226 Difference]: Without dead ends: 43448 [2021-07-13 20:47:31,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11743 ImplicationChecksByTransitivity, 2116.7ms TimeCoverageRelationStatistics Valid=5181, Invalid=22209, Unknown=0, NotChecked=0, Total=27390 [2021-07-13 20:47:32,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43448 states. [2021-07-13 20:47:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43448 to 17843. [2021-07-13 20:47:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17843 states, 17842 states have (on average 3.444064566752606) internal successors, (61449), 17842 states have internal predecessors, (61449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17843 states to 17843 states and 61449 transitions. [2021-07-13 20:47:32,701 INFO L78 Accepts]: Start accepts. Automaton has 17843 states and 61449 transitions. Word has length 36 [2021-07-13 20:47:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:32,701 INFO L482 AbstractCegarLoop]: Abstraction has 17843 states and 61449 transitions. [2021-07-13 20:47:32,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 17843 states and 61449 transitions. [2021-07-13 20:47:32,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:32,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:32,729 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:32,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 20:47:32,929 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:32,929 INFO L82 PathProgramCache]: Analyzing trace with hash -428849322, now seen corresponding path program 105 times [2021-07-13 20:47:32,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:32,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008372559] [2021-07-13 20:47:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:32,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:32,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008372559] [2021-07-13 20:47:32,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008372559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:32,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934208210] [2021-07-13 20:47:32,995 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:33,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:47:33,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:33,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:47:33,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:33,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934208210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:33,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:33,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:47:33,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653143103] [2021-07-13 20:47:33,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:47:33,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:33,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:47:33,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:47:33,147 INFO L87 Difference]: Start difference. First operand 17843 states and 61449 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:35,269 INFO L93 Difference]: Finished difference Result 39837 states and 131123 transitions. [2021-07-13 20:47:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-13 20:47:35,269 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:35,372 INFO L225 Difference]: With dead ends: 39837 [2021-07-13 20:47:35,372 INFO L226 Difference]: Without dead ends: 39721 [2021-07-13 20:47:35,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6312 ImplicationChecksByTransitivity, 1385.0ms TimeCoverageRelationStatistics Valid=3104, Invalid=12396, Unknown=0, NotChecked=0, Total=15500 [2021-07-13 20:47:35,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39721 states. [2021-07-13 20:47:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39721 to 17669. [2021-07-13 20:47:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17669 states, 17668 states have (on average 3.4479284582295677) internal successors, (60918), 17668 states have internal predecessors, (60918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17669 states to 17669 states and 60918 transitions. [2021-07-13 20:47:36,083 INFO L78 Accepts]: Start accepts. Automaton has 17669 states and 60918 transitions. Word has length 36 [2021-07-13 20:47:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:36,083 INFO L482 AbstractCegarLoop]: Abstraction has 17669 states and 60918 transitions. [2021-07-13 20:47:36,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 17669 states and 60918 transitions. [2021-07-13 20:47:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:36,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:36,111 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:36,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 20:47:36,311 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:36,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1065316176, now seen corresponding path program 106 times [2021-07-13 20:47:36,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:36,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028606375] [2021-07-13 20:47:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:36,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:36,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028606375] [2021-07-13 20:47:36,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028606375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:36,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82612932] [2021-07-13 20:47:36,371 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:36,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:36,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:36,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:47:36,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:47:36,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82612932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:36,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:36,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-07-13 20:47:36,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714755325] [2021-07-13 20:47:36,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:47:36,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:36,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:47:36,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:47:36,513 INFO L87 Difference]: Start difference. First operand 17669 states and 60918 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:38,585 INFO L93 Difference]: Finished difference Result 38843 states and 128526 transitions. [2021-07-13 20:47:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-13 20:47:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:38,679 INFO L225 Difference]: With dead ends: 38843 [2021-07-13 20:47:38,679 INFO L226 Difference]: Without dead ends: 38727 [2021-07-13 20:47:38,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 1237.4ms TimeCoverageRelationStatistics Valid=2357, Invalid=10983, Unknown=0, NotChecked=0, Total=13340 [2021-07-13 20:47:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38727 states. [2021-07-13 20:47:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38727 to 17699. [2021-07-13 20:47:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17699 states, 17698 states have (on average 3.446208611142502) internal successors, (60991), 17698 states have internal predecessors, (60991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17699 states to 17699 states and 60991 transitions. [2021-07-13 20:47:39,275 INFO L78 Accepts]: Start accepts. Automaton has 17699 states and 60991 transitions. Word has length 36 [2021-07-13 20:47:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:39,275 INFO L482 AbstractCegarLoop]: Abstraction has 17699 states and 60991 transitions. [2021-07-13 20:47:39,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 17699 states and 60991 transitions. [2021-07-13 20:47:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:39,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:39,302 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:39,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:39,502 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:39,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:39,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1348989260, now seen corresponding path program 107 times [2021-07-13 20:47:39,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:39,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588225240] [2021-07-13 20:47:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:39,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:39,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588225240] [2021-07-13 20:47:39,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588225240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:39,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191963689] [2021-07-13 20:47:39,564 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:39,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:47:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:39,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:47:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:47:39,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191963689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:39,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:39,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-07-13 20:47:39,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158750833] [2021-07-13 20:47:39,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:39,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:39,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:39,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:39,735 INFO L87 Difference]: Start difference. First operand 17699 states and 60991 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:41,573 INFO L93 Difference]: Finished difference Result 37783 states and 125271 transitions. [2021-07-13 20:47:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-13 20:47:41,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:41,662 INFO L225 Difference]: With dead ends: 37783 [2021-07-13 20:47:41,662 INFO L226 Difference]: Without dead ends: 37663 [2021-07-13 20:47:41,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4108 ImplicationChecksByTransitivity, 1132.7ms TimeCoverageRelationStatistics Valid=2049, Invalid=9081, Unknown=0, NotChecked=0, Total=11130 [2021-07-13 20:47:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37663 states. [2021-07-13 20:47:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37663 to 18035. [2021-07-13 20:47:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18035 states, 18034 states have (on average 3.456692913385827) internal successors, (62338), 18034 states have internal predecessors, (62338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 62338 transitions. [2021-07-13 20:47:42,229 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 62338 transitions. Word has length 36 [2021-07-13 20:47:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:42,229 INFO L482 AbstractCegarLoop]: Abstraction has 18035 states and 62338 transitions. [2021-07-13 20:47:42,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 62338 transitions. [2021-07-13 20:47:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:42,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:42,257 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:42,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 20:47:42,458 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:42,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:42,458 INFO L82 PathProgramCache]: Analyzing trace with hash 255839428, now seen corresponding path program 108 times [2021-07-13 20:47:42,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:42,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744758132] [2021-07-13 20:47:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:47:42,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:42,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744758132] [2021-07-13 20:47:42,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744758132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:42,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892389098] [2021-07-13 20:47:42,498 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:42,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:47:42,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:42,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:47:42,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:42,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892389098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:42,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:42,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:47:42,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262151537] [2021-07-13 20:47:42,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:42,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:42,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:42,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:42,634 INFO L87 Difference]: Start difference. First operand 18035 states and 62338 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:44,198 INFO L93 Difference]: Finished difference Result 41243 states and 137063 transitions. [2021-07-13 20:47:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:47:44,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:44,298 INFO L225 Difference]: With dead ends: 41243 [2021-07-13 20:47:44,298 INFO L226 Difference]: Without dead ends: 41243 [2021-07-13 20:47:44,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 936.9ms TimeCoverageRelationStatistics Valid=1732, Invalid=6100, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:47:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41243 states. [2021-07-13 20:47:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41243 to 18004. [2021-07-13 20:47:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18004 states, 18003 states have (on average 3.4605343553852137) internal successors, (62300), 18003 states have internal predecessors, (62300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18004 states to 18004 states and 62300 transitions. [2021-07-13 20:47:44,920 INFO L78 Accepts]: Start accepts. Automaton has 18004 states and 62300 transitions. Word has length 36 [2021-07-13 20:47:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:44,920 INFO L482 AbstractCegarLoop]: Abstraction has 18004 states and 62300 transitions. [2021-07-13 20:47:44,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 18004 states and 62300 transitions. [2021-07-13 20:47:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:44,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:44,949 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:45,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-13 20:47:45,150 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:45,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:45,150 INFO L82 PathProgramCache]: Analyzing trace with hash 30795628, now seen corresponding path program 109 times [2021-07-13 20:47:45,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:45,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410285231] [2021-07-13 20:47:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:45,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:45,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410285231] [2021-07-13 20:47:45,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410285231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:45,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628982506] [2021-07-13 20:47:45,210 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:45,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:47:45,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:47:45,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628982506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:45,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:45,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-13 20:47:45,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450601333] [2021-07-13 20:47:45,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:45,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:45,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:45,321 INFO L87 Difference]: Start difference. First operand 18004 states and 62300 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:46,758 INFO L93 Difference]: Finished difference Result 39031 states and 128601 transitions. [2021-07-13 20:47:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-13 20:47:46,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:46,850 INFO L225 Difference]: With dead ends: 39031 [2021-07-13 20:47:46,850 INFO L226 Difference]: Without dead ends: 38811 [2021-07-13 20:47:46,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 859.9ms TimeCoverageRelationStatistics Valid=1466, Invalid=6190, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:47:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38811 states. [2021-07-13 20:47:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38811 to 18070. [2021-07-13 20:47:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18070 states, 18069 states have (on average 3.458354087110521) internal successors, (62489), 18069 states have internal predecessors, (62489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:47,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18070 states to 18070 states and 62489 transitions. [2021-07-13 20:47:47,475 INFO L78 Accepts]: Start accepts. Automaton has 18070 states and 62489 transitions. Word has length 36 [2021-07-13 20:47:47,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:47,475 INFO L482 AbstractCegarLoop]: Abstraction has 18070 states and 62489 transitions. [2021-07-13 20:47:47,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:47,475 INFO L276 IsEmpty]: Start isEmpty. Operand 18070 states and 62489 transitions. [2021-07-13 20:47:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:47,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:47,503 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:47,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:47,703 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1503096560, now seen corresponding path program 110 times [2021-07-13 20:47:47,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:47,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359963316] [2021-07-13 20:47:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:47,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:47,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359963316] [2021-07-13 20:47:47,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359963316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:47,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607982578] [2021-07-13 20:47:47,761 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:47,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:47,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:47:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:47:47,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607982578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:47,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:47,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-13 20:47:47,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176861875] [2021-07-13 20:47:47,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:47,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:47,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:47,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:47,882 INFO L87 Difference]: Start difference. First operand 18070 states and 62489 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:50,177 INFO L93 Difference]: Finished difference Result 41905 states and 136821 transitions. [2021-07-13 20:47:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-07-13 20:47:50,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:50,281 INFO L225 Difference]: With dead ends: 41905 [2021-07-13 20:47:50,282 INFO L226 Difference]: Without dead ends: 41889 [2021-07-13 20:47:50,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 1445.7ms TimeCoverageRelationStatistics Valid=3281, Invalid=14541, Unknown=0, NotChecked=0, Total=17822 [2021-07-13 20:47:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41889 states. [2021-07-13 20:47:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41889 to 18381. [2021-07-13 20:47:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18381 states, 18380 states have (on average 3.4394450489662676) internal successors, (63217), 18380 states have internal predecessors, (63217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:51,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18381 states to 18381 states and 63217 transitions. [2021-07-13 20:47:51,157 INFO L78 Accepts]: Start accepts. Automaton has 18381 states and 63217 transitions. Word has length 36 [2021-07-13 20:47:51,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:51,158 INFO L482 AbstractCegarLoop]: Abstraction has 18381 states and 63217 transitions. [2021-07-13 20:47:51,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 18381 states and 63217 transitions. [2021-07-13 20:47:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:51,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:51,184 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:51,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:51,384 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1164442992, now seen corresponding path program 111 times [2021-07-13 20:47:51,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:51,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651142676] [2021-07-13 20:47:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:51,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:51,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651142676] [2021-07-13 20:47:51,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651142676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:51,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197581129] [2021-07-13 20:47:51,451 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:51,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:47:51,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:51,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:47:51,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:51,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197581129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:51,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:51,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-07-13 20:47:51,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923328879] [2021-07-13 20:47:51,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:51,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:51,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:51,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:51,568 INFO L87 Difference]: Start difference. First operand 18381 states and 63217 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:53,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:53,369 INFO L93 Difference]: Finished difference Result 39347 states and 129043 transitions. [2021-07-13 20:47:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-13 20:47:53,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:53,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:53,467 INFO L225 Difference]: With dead ends: 39347 [2021-07-13 20:47:53,467 INFO L226 Difference]: Without dead ends: 39111 [2021-07-13 20:47:53,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 1072.1ms TimeCoverageRelationStatistics Valid=2013, Invalid=8907, Unknown=0, NotChecked=0, Total=10920 [2021-07-13 20:47:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39111 states. [2021-07-13 20:47:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39111 to 18459. [2021-07-13 20:47:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18459 states, 18458 states have (on average 3.4369920901506124) internal successors, (63440), 18458 states have internal predecessors, (63440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18459 states to 18459 states and 63440 transitions. [2021-07-13 20:47:54,163 INFO L78 Accepts]: Start accepts. Automaton has 18459 states and 63440 transitions. Word has length 36 [2021-07-13 20:47:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:54,163 INFO L482 AbstractCegarLoop]: Abstraction has 18459 states and 63440 transitions. [2021-07-13 20:47:54,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 18459 states and 63440 transitions. [2021-07-13 20:47:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:54,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:54,192 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:54,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:54,393 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1293569036, now seen corresponding path program 112 times [2021-07-13 20:47:54,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:54,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165487936] [2021-07-13 20:47:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:54,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:54,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165487936] [2021-07-13 20:47:54,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165487936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:54,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443297054] [2021-07-13 20:47:54,459 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:54,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:54,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:54,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:47:54,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:47:54,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443297054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:54,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:54,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-07-13 20:47:54,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897940259] [2021-07-13 20:47:54,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:54,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:54,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:54,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:54,570 INFO L87 Difference]: Start difference. First operand 18459 states and 63440 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:56,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:56,317 INFO L93 Difference]: Finished difference Result 38875 states and 128248 transitions. [2021-07-13 20:47:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-13 20:47:56,318 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:47:56,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:56,428 INFO L225 Difference]: With dead ends: 38875 [2021-07-13 20:47:56,428 INFO L226 Difference]: Without dead ends: 38767 [2021-07-13 20:47:56,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 1086.3ms TimeCoverageRelationStatistics Valid=2364, Invalid=9626, Unknown=0, NotChecked=0, Total=11990 [2021-07-13 20:47:56,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38767 states. [2021-07-13 20:47:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38767 to 18901. [2021-07-13 20:47:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18901 states, 18900 states have (on average 3.4197354497354495) internal successors, (64633), 18900 states have internal predecessors, (64633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:57,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18901 states to 18901 states and 64633 transitions. [2021-07-13 20:47:57,204 INFO L78 Accepts]: Start accepts. Automaton has 18901 states and 64633 transitions. Word has length 36 [2021-07-13 20:47:57,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:57,204 INFO L482 AbstractCegarLoop]: Abstraction has 18901 states and 64633 transitions. [2021-07-13 20:47:57,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:57,205 INFO L276 IsEmpty]: Start isEmpty. Operand 18901 states and 64633 transitions. [2021-07-13 20:47:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:47:57,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:57,234 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:57,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-07-13 20:47:57,435 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:57,435 INFO L82 PathProgramCache]: Analyzing trace with hash -253287824, now seen corresponding path program 113 times [2021-07-13 20:47:57,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:57,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106183391] [2021-07-13 20:47:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:57,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:57,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106183391] [2021-07-13 20:47:57,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106183391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:57,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927160183] [2021-07-13 20:47:57,495 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:57,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:47:57,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:57,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:47:57,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:57,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927160183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:57,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:57,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-07-13 20:47:57,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516158391] [2021-07-13 20:47:57,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:57,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:57,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:57,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:57,619 INFO L87 Difference]: Start difference. First operand 18901 states and 64633 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:00,171 INFO L93 Difference]: Finished difference Result 40691 states and 133194 transitions. [2021-07-13 20:48:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-07-13 20:48:00,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:00,271 INFO L225 Difference]: With dead ends: 40691 [2021-07-13 20:48:00,272 INFO L226 Difference]: Without dead ends: 40691 [2021-07-13 20:48:00,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 1746.5ms TimeCoverageRelationStatistics Valid=4335, Invalid=18315, Unknown=0, NotChecked=0, Total=22650 [2021-07-13 20:48:00,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40691 states. [2021-07-13 20:48:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40691 to 17027. [2021-07-13 20:48:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17027 states, 17026 states have (on average 3.482086221073652) internal successors, (59286), 17026 states have internal predecessors, (59286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17027 states to 17027 states and 59286 transitions. [2021-07-13 20:48:00,898 INFO L78 Accepts]: Start accepts. Automaton has 17027 states and 59286 transitions. Word has length 36 [2021-07-13 20:48:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:00,898 INFO L482 AbstractCegarLoop]: Abstraction has 17027 states and 59286 transitions. [2021-07-13 20:48:00,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 17027 states and 59286 transitions. [2021-07-13 20:48:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:00,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:00,925 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:01,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 20:48:01,130 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:01,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:01,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1172720400, now seen corresponding path program 114 times [2021-07-13 20:48:01,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:01,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586774393] [2021-07-13 20:48:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:01,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586774393] [2021-07-13 20:48:01,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586774393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893802852] [2021-07-13 20:48:01,182 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:01,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:48:01,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:01,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:48:01,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:01,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893802852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:01,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:01,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 20:48:01,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635954585] [2021-07-13 20:48:01,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:48:01,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:01,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:48:01,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:48:01,343 INFO L87 Difference]: Start difference. First operand 17027 states and 59286 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:02,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:02,301 INFO L93 Difference]: Finished difference Result 36359 states and 121507 transitions. [2021-07-13 20:48:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:48:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:02,385 INFO L225 Difference]: With dead ends: 36359 [2021-07-13 20:48:02,385 INFO L226 Difference]: Without dead ends: 36359 [2021-07-13 20:48:02,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=568, Invalid=1784, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:48:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36359 states. [2021-07-13 20:48:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36359 to 17013. [2021-07-13 20:48:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17013 states, 17012 states have (on average 3.477251351986833) internal successors, (59155), 17012 states have internal predecessors, (59155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17013 states to 17013 states and 59155 transitions. [2021-07-13 20:48:02,877 INFO L78 Accepts]: Start accepts. Automaton has 17013 states and 59155 transitions. Word has length 36 [2021-07-13 20:48:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:02,877 INFO L482 AbstractCegarLoop]: Abstraction has 17013 states and 59155 transitions. [2021-07-13 20:48:02,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 17013 states and 59155 transitions. [2021-07-13 20:48:02,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:02,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:02,903 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:03,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 20:48:03,104 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:03,104 INFO L82 PathProgramCache]: Analyzing trace with hash -248629260, now seen corresponding path program 115 times [2021-07-13 20:48:03,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:03,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817494503] [2021-07-13 20:48:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:03,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817494503] [2021-07-13 20:48:03,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817494503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998620523] [2021-07-13 20:48:03,157 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:03,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:48:03,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:03,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998620523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:03,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:03,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 20:48:03,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142358029] [2021-07-13 20:48:03,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:48:03,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:03,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:48:03,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:48:03,332 INFO L87 Difference]: Start difference. First operand 17013 states and 59155 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:04,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:04,465 INFO L93 Difference]: Finished difference Result 37754 states and 124912 transitions. [2021-07-13 20:48:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:48:04,465 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:04,562 INFO L225 Difference]: With dead ends: 37754 [2021-07-13 20:48:04,562 INFO L226 Difference]: Without dead ends: 37754 [2021-07-13 20:48:04,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 585.5ms TimeCoverageRelationStatistics Valid=910, Invalid=2996, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:48:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37754 states. [2021-07-13 20:48:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37754 to 17024. [2021-07-13 20:48:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17024 states, 17023 states have (on average 3.4766492392645243) internal successors, (59183), 17023 states have internal predecessors, (59183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17024 states to 17024 states and 59183 transitions. [2021-07-13 20:48:05,177 INFO L78 Accepts]: Start accepts. Automaton has 17024 states and 59183 transitions. Word has length 36 [2021-07-13 20:48:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:05,178 INFO L482 AbstractCegarLoop]: Abstraction has 17024 states and 59183 transitions. [2021-07-13 20:48:05,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 17024 states and 59183 transitions. [2021-07-13 20:48:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:05,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:05,204 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:05,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-13 20:48:05,404 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:05,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:05,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1447944180, now seen corresponding path program 116 times [2021-07-13 20:48:05,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:05,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881397101] [2021-07-13 20:48:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:05,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:05,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881397101] [2021-07-13 20:48:05,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881397101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:05,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954622135] [2021-07-13 20:48:05,463 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:05,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:05,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:48:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:05,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954622135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:05,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:05,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 20:48:05,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468548774] [2021-07-13 20:48:05,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:48:05,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:05,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:48:05,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:48:05,654 INFO L87 Difference]: Start difference. First operand 17024 states and 59183 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:06,867 INFO L93 Difference]: Finished difference Result 37846 states and 125454 transitions. [2021-07-13 20:48:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:48:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:06,968 INFO L225 Difference]: With dead ends: 37846 [2021-07-13 20:48:06,969 INFO L226 Difference]: Without dead ends: 37846 [2021-07-13 20:48:06,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 613.4ms TimeCoverageRelationStatistics Valid=959, Invalid=3073, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:48:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37846 states. [2021-07-13 20:48:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37846 to 17016. [2021-07-13 20:48:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17016 states, 17015 states have (on average 3.4787540405524537) internal successors, (59191), 17015 states have internal predecessors, (59191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17016 states to 17016 states and 59191 transitions. [2021-07-13 20:48:07,615 INFO L78 Accepts]: Start accepts. Automaton has 17016 states and 59191 transitions. Word has length 36 [2021-07-13 20:48:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:07,615 INFO L482 AbstractCegarLoop]: Abstraction has 17016 states and 59191 transitions. [2021-07-13 20:48:07,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 17016 states and 59191 transitions. [2021-07-13 20:48:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:07,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:07,643 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:07,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 20:48:07,843 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:07,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1463404976, now seen corresponding path program 117 times [2021-07-13 20:48:07,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:07,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55152846] [2021-07-13 20:48:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:07,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:07,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55152846] [2021-07-13 20:48:07,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55152846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:07,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605000590] [2021-07-13 20:48:07,899 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:07,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:48:07,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:07,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:48:07,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:08,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-13 20:48:08,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:08,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:08,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:48:08,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-07-13 20:48:08,144 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-07-13 20:48:08,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:48:08,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:08,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:08,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:48:08,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-07-13 20:48:08,228 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-07-13 20:48:08,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-07-13 20:48:08,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:08,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:08,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:48:08,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-07-13 20:48:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 20:48:08,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605000590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:08,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:08,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 20:48:08,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923776685] [2021-07-13 20:48:08,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:48:08,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:48:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:48:08,447 INFO L87 Difference]: Start difference. First operand 17016 states and 59191 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:11,851 INFO L93 Difference]: Finished difference Result 29934 states and 99159 transitions. [2021-07-13 20:48:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:48:11,852 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:11,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:11,919 INFO L225 Difference]: With dead ends: 29934 [2021-07-13 20:48:11,919 INFO L226 Difference]: Without dead ends: 29934 [2021-07-13 20:48:11,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3260 ImplicationChecksByTransitivity, 2342.2ms TimeCoverageRelationStatistics Valid=1800, Invalid=8300, Unknown=0, NotChecked=0, Total=10100 [2021-07-13 20:48:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29934 states. [2021-07-13 20:48:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29934 to 17104. [2021-07-13 20:48:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17104 states, 17103 states have (on average 3.484067122727007) internal successors, (59588), 17103 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17104 states to 17104 states and 59588 transitions. [2021-07-13 20:48:12,377 INFO L78 Accepts]: Start accepts. Automaton has 17104 states and 59588 transitions. Word has length 36 [2021-07-13 20:48:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:12,377 INFO L482 AbstractCegarLoop]: Abstraction has 17104 states and 59588 transitions. [2021-07-13 20:48:12,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 17104 states and 59588 transitions. [2021-07-13 20:48:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:12,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:12,406 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:12,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:12,606 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:12,606 INFO L82 PathProgramCache]: Analyzing trace with hash -784175790, now seen corresponding path program 118 times [2021-07-13 20:48:12,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:12,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523219355] [2021-07-13 20:48:12,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:12,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:12,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523219355] [2021-07-13 20:48:12,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523219355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:12,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64384920] [2021-07-13 20:48:12,651 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:12,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:12,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:12,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:48:12,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:12,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64384920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:12,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:12,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 20:48:12,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535085229] [2021-07-13 20:48:12,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:48:12,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:12,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:48:12,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:48:12,814 INFO L87 Difference]: Start difference. First operand 17104 states and 59588 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:15,509 INFO L93 Difference]: Finished difference Result 36789 states and 120419 transitions. [2021-07-13 20:48:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-07-13 20:48:15,509 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:15,597 INFO L225 Difference]: With dead ends: 36789 [2021-07-13 20:48:15,597 INFO L226 Difference]: Without dead ends: 36789 [2021-07-13 20:48:15,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7472 ImplicationChecksByTransitivity, 1686.2ms TimeCoverageRelationStatistics Valid=3298, Invalid=15608, Unknown=0, NotChecked=0, Total=18906 [2021-07-13 20:48:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36789 states. [2021-07-13 20:48:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36789 to 17371. [2021-07-13 20:48:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.482153137593552) internal successors, (60485), 17370 states have internal predecessors, (60485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 60485 transitions. [2021-07-13 20:48:16,139 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 60485 transitions. Word has length 36 [2021-07-13 20:48:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:16,139 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 60485 transitions. [2021-07-13 20:48:16,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 60485 transitions. [2021-07-13 20:48:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:16,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:16,167 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:16,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 20:48:16,367 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:16,368 INFO L82 PathProgramCache]: Analyzing trace with hash -265224148, now seen corresponding path program 119 times [2021-07-13 20:48:16,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:16,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984031058] [2021-07-13 20:48:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:16,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:16,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984031058] [2021-07-13 20:48:16,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984031058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:16,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133886312] [2021-07-13 20:48:16,420 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:16,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:48:16,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:16,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:48:16,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:16,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133886312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:16,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:16,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 20:48:16,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411245590] [2021-07-13 20:48:16,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:48:16,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:16,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:48:16,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:48:16,564 INFO L87 Difference]: Start difference. First operand 17371 states and 60485 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:18,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:18,314 INFO L93 Difference]: Finished difference Result 34245 states and 114443 transitions. [2021-07-13 20:48:18,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:48:18,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:18,412 INFO L225 Difference]: With dead ends: 34245 [2021-07-13 20:48:18,412 INFO L226 Difference]: Without dead ends: 34173 [2021-07-13 20:48:18,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3600 ImplicationChecksByTransitivity, 1066.4ms TimeCoverageRelationStatistics Valid=2064, Invalid=7836, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:48:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34173 states. [2021-07-13 20:48:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34173 to 16919. [2021-07-13 20:48:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16919 states, 16918 states have (on average 3.4816763210781416) internal successors, (58903), 16918 states have internal predecessors, (58903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16919 states to 16919 states and 58903 transitions. [2021-07-13 20:48:18,922 INFO L78 Accepts]: Start accepts. Automaton has 16919 states and 58903 transitions. Word has length 36 [2021-07-13 20:48:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:18,922 INFO L482 AbstractCegarLoop]: Abstraction has 16919 states and 58903 transitions. [2021-07-13 20:48:18,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 16919 states and 58903 transitions. [2021-07-13 20:48:18,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:18,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:18,948 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:19,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-13 20:48:19,148 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:19,148 INFO L82 PathProgramCache]: Analyzing trace with hash -907070356, now seen corresponding path program 120 times [2021-07-13 20:48:19,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:19,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228832428] [2021-07-13 20:48:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:19,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:19,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228832428] [2021-07-13 20:48:19,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228832428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:19,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123364709] [2021-07-13 20:48:19,208 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:19,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:48:19,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:19,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:48:19,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:48:19,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123364709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:19,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:19,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:48:19,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461223521] [2021-07-13 20:48:19,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:48:19,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:19,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:48:19,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:48:19,344 INFO L87 Difference]: Start difference. First operand 16919 states and 58903 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:21,405 INFO L93 Difference]: Finished difference Result 34016 states and 113681 transitions. [2021-07-13 20:48:21,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-07-13 20:48:21,405 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:21,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:21,485 INFO L225 Difference]: With dead ends: 34016 [2021-07-13 20:48:21,486 INFO L226 Difference]: Without dead ends: 33956 [2021-07-13 20:48:21,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4457 ImplicationChecksByTransitivity, 1186.4ms TimeCoverageRelationStatistics Valid=2358, Invalid=9852, Unknown=0, NotChecked=0, Total=12210 [2021-07-13 20:48:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33956 states. [2021-07-13 20:48:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33956 to 16875. [2021-07-13 20:48:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16875 states, 16874 states have (on average 3.4836434751688987) internal successors, (58783), 16874 states have internal predecessors, (58783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16875 states to 16875 states and 58783 transitions. [2021-07-13 20:48:21,980 INFO L78 Accepts]: Start accepts. Automaton has 16875 states and 58783 transitions. Word has length 36 [2021-07-13 20:48:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:21,980 INFO L482 AbstractCegarLoop]: Abstraction has 16875 states and 58783 transitions. [2021-07-13 20:48:21,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 16875 states and 58783 transitions. [2021-07-13 20:48:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:22,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:22,011 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:22,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:22,211 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:22,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:22,211 INFO L82 PathProgramCache]: Analyzing trace with hash -719103608, now seen corresponding path program 121 times [2021-07-13 20:48:22,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:22,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329487954] [2021-07-13 20:48:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:22,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:22,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329487954] [2021-07-13 20:48:22,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329487954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:22,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698138441] [2021-07-13 20:48:22,268 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:22,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:48:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:22,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698138441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:22,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:22,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:48:22,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281892015] [2021-07-13 20:48:22,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:48:22,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:48:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:48:22,443 INFO L87 Difference]: Start difference. First operand 16875 states and 58783 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:23,573 INFO L93 Difference]: Finished difference Result 38582 states and 129677 transitions. [2021-07-13 20:48:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:48:23,574 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:23,676 INFO L225 Difference]: With dead ends: 38582 [2021-07-13 20:48:23,676 INFO L226 Difference]: Without dead ends: 38582 [2021-07-13 20:48:23,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 603.4ms TimeCoverageRelationStatistics Valid=922, Invalid=3110, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:48:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38582 states. [2021-07-13 20:48:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38582 to 17496. [2021-07-13 20:48:24,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17496 states, 17495 states have (on average 3.5108316661903403) internal successors, (61422), 17495 states have internal predecessors, (61422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:24,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17496 states to 17496 states and 61422 transitions. [2021-07-13 20:48:24,316 INFO L78 Accepts]: Start accepts. Automaton has 17496 states and 61422 transitions. Word has length 36 [2021-07-13 20:48:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:24,316 INFO L482 AbstractCegarLoop]: Abstraction has 17496 states and 61422 transitions. [2021-07-13 20:48:24,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 17496 states and 61422 transitions. [2021-07-13 20:48:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:24,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:24,343 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:24,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:24,544 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:24,544 INFO L82 PathProgramCache]: Analyzing trace with hash -703642812, now seen corresponding path program 122 times [2021-07-13 20:48:24,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:24,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964962765] [2021-07-13 20:48:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:24,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:24,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964962765] [2021-07-13 20:48:24,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964962765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:24,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102617096] [2021-07-13 20:48:24,599 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:24,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:24,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:24,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:48:24,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:24,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102617096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:24,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:24,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:48:24,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354557301] [2021-07-13 20:48:24,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:48:24,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:24,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:48:24,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:48:24,776 INFO L87 Difference]: Start difference. First operand 17496 states and 61422 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:26,015 INFO L93 Difference]: Finished difference Result 39068 states and 130518 transitions. [2021-07-13 20:48:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:48:26,016 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:26,127 INFO L225 Difference]: With dead ends: 39068 [2021-07-13 20:48:26,127 INFO L226 Difference]: Without dead ends: 39068 [2021-07-13 20:48:26,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=1170, Invalid=3660, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:48:26,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39068 states. [2021-07-13 20:48:26,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39068 to 17040. [2021-07-13 20:48:26,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17040 states, 17039 states have (on average 3.4929866776219263) internal successors, (59517), 17039 states have internal predecessors, (59517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17040 states to 17040 states and 59517 transitions. [2021-07-13 20:48:26,790 INFO L78 Accepts]: Start accepts. Automaton has 17040 states and 59517 transitions. Word has length 36 [2021-07-13 20:48:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:26,790 INFO L482 AbstractCegarLoop]: Abstraction has 17040 states and 59517 transitions. [2021-07-13 20:48:26,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 17040 states and 59517 transitions. [2021-07-13 20:48:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:26,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:26,817 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:27,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:27,018 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:27,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:27,018 INFO L82 PathProgramCache]: Analyzing trace with hash 444490688, now seen corresponding path program 123 times [2021-07-13 20:48:27,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:27,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750670758] [2021-07-13 20:48:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:27,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:27,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750670758] [2021-07-13 20:48:27,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750670758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:27,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717434742] [2021-07-13 20:48:27,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:27,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:48:27,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:27,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:48:27,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:27,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717434742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:27,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:27,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:48:27,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633514185] [2021-07-13 20:48:27,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:48:27,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:27,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:48:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:48:27,233 INFO L87 Difference]: Start difference. First operand 17040 states and 59517 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:28,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:28,231 INFO L93 Difference]: Finished difference Result 35719 states and 119509 transitions. [2021-07-13 20:48:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:48:28,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:28,316 INFO L225 Difference]: With dead ends: 35719 [2021-07-13 20:48:28,316 INFO L226 Difference]: Without dead ends: 35719 [2021-07-13 20:48:28,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=703, Invalid=2377, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:48:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35719 states. [2021-07-13 20:48:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35719 to 16855. [2021-07-13 20:48:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16855 states, 16854 states have (on average 3.483683398599739) internal successors, (58714), 16854 states have internal predecessors, (58714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16855 states to 16855 states and 58714 transitions. [2021-07-13 20:48:28,886 INFO L78 Accepts]: Start accepts. Automaton has 16855 states and 58714 transitions. Word has length 36 [2021-07-13 20:48:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:28,886 INFO L482 AbstractCegarLoop]: Abstraction has 16855 states and 58714 transitions. [2021-07-13 20:48:28,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 16855 states and 58714 transitions. [2021-07-13 20:48:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:28,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:28,913 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:29,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:29,113 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:29,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1078249612, now seen corresponding path program 124 times [2021-07-13 20:48:29,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:29,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556024631] [2021-07-13 20:48:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:29,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:29,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556024631] [2021-07-13 20:48:29,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556024631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:29,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068947742] [2021-07-13 20:48:29,259 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:29,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:29,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:29,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:48:29,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:29,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068947742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:29,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:29,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 20:48:29,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144424539] [2021-07-13 20:48:29,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:48:29,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:29,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:48:29,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:48:29,416 INFO L87 Difference]: Start difference. First operand 16855 states and 58714 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:30,156 INFO L93 Difference]: Finished difference Result 34570 states and 115444 transitions. [2021-07-13 20:48:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:48:30,157 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:30,242 INFO L225 Difference]: With dead ends: 34570 [2021-07-13 20:48:30,243 INFO L226 Difference]: Without dead ends: 34570 [2021-07-13 20:48:30,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 490.9ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:48:30,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34570 states. [2021-07-13 20:48:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34570 to 16873. [2021-07-13 20:48:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16873 states, 16872 states have (on average 3.4834637268847795) internal successors, (58773), 16872 states have internal predecessors, (58773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16873 states to 16873 states and 58773 transitions. [2021-07-13 20:48:30,752 INFO L78 Accepts]: Start accepts. Automaton has 16873 states and 58773 transitions. Word has length 36 [2021-07-13 20:48:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:30,752 INFO L482 AbstractCegarLoop]: Abstraction has 16873 states and 58773 transitions. [2021-07-13 20:48:30,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 16873 states and 58773 transitions. [2021-07-13 20:48:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:30,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:30,778 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:30,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-13 20:48:30,979 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:30,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1249008814, now seen corresponding path program 125 times [2021-07-13 20:48:30,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:30,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400721605] [2021-07-13 20:48:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:31,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:31,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400721605] [2021-07-13 20:48:31,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400721605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:31,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978925785] [2021-07-13 20:48:31,042 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:31,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:48:31,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:31,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:48:31,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:48:31,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978925785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:31,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:31,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:48:31,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276478036] [2021-07-13 20:48:31,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:48:31,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:31,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:48:31,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:48:31,201 INFO L87 Difference]: Start difference. First operand 16873 states and 58773 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:33,226 INFO L93 Difference]: Finished difference Result 36187 states and 119134 transitions. [2021-07-13 20:48:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-07-13 20:48:33,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:33,318 INFO L225 Difference]: With dead ends: 36187 [2021-07-13 20:48:33,318 INFO L226 Difference]: Without dead ends: 36183 [2021-07-13 20:48:33,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4706 ImplicationChecksByTransitivity, 1243.6ms TimeCoverageRelationStatistics Valid=2270, Invalid=10612, Unknown=0, NotChecked=0, Total=12882 [2021-07-13 20:48:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36183 states. [2021-07-13 20:48:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36183 to 17057. [2021-07-13 20:48:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17057 states, 17056 states have (on average 3.480593339587242) internal successors, (59365), 17056 states have internal predecessors, (59365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:33,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17057 states to 17057 states and 59365 transitions. [2021-07-13 20:48:33,852 INFO L78 Accepts]: Start accepts. Automaton has 17057 states and 59365 transitions. Word has length 36 [2021-07-13 20:48:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:33,852 INFO L482 AbstractCegarLoop]: Abstraction has 17057 states and 59365 transitions. [2021-07-13 20:48:33,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:33,853 INFO L276 IsEmpty]: Start isEmpty. Operand 17057 states and 59365 transitions. [2021-07-13 20:48:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:33,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:33,880 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:34,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:34,080 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1793730568, now seen corresponding path program 126 times [2021-07-13 20:48:34,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:34,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331257868] [2021-07-13 20:48:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:34,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:34,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331257868] [2021-07-13 20:48:34,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331257868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:34,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378920131] [2021-07-13 20:48:34,130 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:34,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:48:34,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:34,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:48:34,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:48:34,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378920131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:34,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:34,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-13 20:48:34,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346813686] [2021-07-13 20:48:34,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:48:34,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:34,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:48:34,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:48:34,274 INFO L87 Difference]: Start difference. First operand 17057 states and 59365 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:36,479 INFO L93 Difference]: Finished difference Result 38126 states and 127134 transitions. [2021-07-13 20:48:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-07-13 20:48:36,479 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:36,571 INFO L225 Difference]: With dead ends: 38126 [2021-07-13 20:48:36,571 INFO L226 Difference]: Without dead ends: 38126 [2021-07-13 20:48:36,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5730 ImplicationChecksByTransitivity, 1408.0ms TimeCoverageRelationStatistics Valid=2664, Invalid=11856, Unknown=0, NotChecked=0, Total=14520 [2021-07-13 20:48:36,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38126 states. [2021-07-13 20:48:37,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38126 to 17565. [2021-07-13 20:48:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17565 states, 17564 states have (on average 3.4988613072193124) internal successors, (61454), 17564 states have internal predecessors, (61454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 61454 transitions. [2021-07-13 20:48:37,172 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 61454 transitions. Word has length 36 [2021-07-13 20:48:37,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:37,172 INFO L482 AbstractCegarLoop]: Abstraction has 17565 states and 61454 transitions. [2021-07-13 20:48:37,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 61454 transitions. [2021-07-13 20:48:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:37,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:37,199 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:37,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 20:48:37,399 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:37,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:37,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1809191364, now seen corresponding path program 127 times [2021-07-13 20:48:37,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:37,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895928406] [2021-07-13 20:48:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:37,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:37,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895928406] [2021-07-13 20:48:37,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895928406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:37,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668239597] [2021-07-13 20:48:37,452 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:37,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:48:37,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:37,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668239597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:37,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:37,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:48:37,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119296850] [2021-07-13 20:48:37,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:48:37,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:37,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:48:37,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:48:37,623 INFO L87 Difference]: Start difference. First operand 17565 states and 61454 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:38,603 INFO L93 Difference]: Finished difference Result 35670 states and 119988 transitions. [2021-07-13 20:48:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:48:38,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:38,694 INFO L225 Difference]: With dead ends: 35670 [2021-07-13 20:48:38,695 INFO L226 Difference]: Without dead ends: 35670 [2021-07-13 20:48:38,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 476.9ms TimeCoverageRelationStatistics Valid=748, Invalid=2222, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:48:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35670 states. [2021-07-13 20:48:39,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35670 to 17384. [2021-07-13 20:48:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17384 states, 17383 states have (on average 3.49122706092159) internal successors, (60688), 17383 states have internal predecessors, (60688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17384 states to 17384 states and 60688 transitions. [2021-07-13 20:48:39,263 INFO L78 Accepts]: Start accepts. Automaton has 17384 states and 60688 transitions. Word has length 36 [2021-07-13 20:48:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:39,264 INFO L482 AbstractCegarLoop]: Abstraction has 17384 states and 60688 transitions. [2021-07-13 20:48:39,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 17384 states and 60688 transitions. [2021-07-13 20:48:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:39,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:39,290 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:39,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 20:48:39,491 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:39,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:39,491 INFO L82 PathProgramCache]: Analyzing trace with hash -530582264, now seen corresponding path program 128 times [2021-07-13 20:48:39,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:39,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377194867] [2021-07-13 20:48:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:39,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:39,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377194867] [2021-07-13 20:48:39,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377194867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:39,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282956335] [2021-07-13 20:48:39,550 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:39,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:39,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:39,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:48:39,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:48:39,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282956335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:39,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:39,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-07-13 20:48:39,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274172837] [2021-07-13 20:48:39,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:48:39,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:39,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:48:39,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:48:39,729 INFO L87 Difference]: Start difference. First operand 17384 states and 60688 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:43,008 INFO L93 Difference]: Finished difference Result 54535 states and 178905 transitions. [2021-07-13 20:48:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-07-13 20:48:43,009 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:43,167 INFO L225 Difference]: With dead ends: 54535 [2021-07-13 20:48:43,167 INFO L226 Difference]: Without dead ends: 54535 [2021-07-13 20:48:43,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12884 ImplicationChecksByTransitivity, 2391.9ms TimeCoverageRelationStatistics Valid=5153, Invalid=24603, Unknown=0, NotChecked=0, Total=29756 [2021-07-13 20:48:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54535 states. [2021-07-13 20:48:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54535 to 23450. [2021-07-13 20:48:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23450 states, 23449 states have (on average 3.4936671073393324) internal successors, (81923), 23449 states have internal predecessors, (81923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23450 states to 23450 states and 81923 transitions. [2021-07-13 20:48:44,025 INFO L78 Accepts]: Start accepts. Automaton has 23450 states and 81923 transitions. Word has length 36 [2021-07-13 20:48:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:44,025 INFO L482 AbstractCegarLoop]: Abstraction has 23450 states and 81923 transitions. [2021-07-13 20:48:44,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 23450 states and 81923 transitions. [2021-07-13 20:48:44,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:44,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:44,060 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:44,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-13 20:48:44,261 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:44,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2079713946, now seen corresponding path program 129 times [2021-07-13 20:48:44,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:44,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619742439] [2021-07-13 20:48:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:44,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:44,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619742439] [2021-07-13 20:48:44,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619742439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:44,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396186033] [2021-07-13 20:48:44,319 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:44,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:48:44,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:48:44,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:44,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-13 20:48:44,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:44,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:44,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:44,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 20:48:44,773 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-07-13 20:48:44,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-07-13 20:48:44,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:44,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:44,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:44,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-13 20:48:44,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:44,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:44,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:44,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-07-13 20:48:44,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:44,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:44,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:48:44,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-07-13 20:48:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:48:44,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396186033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:44,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:44,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-13 20:48:44,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987984953] [2021-07-13 20:48:44,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:48:44,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:44,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:48:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:48:44,934 INFO L87 Difference]: Start difference. First operand 23450 states and 81923 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:47,992 INFO L93 Difference]: Finished difference Result 43833 states and 145969 transitions. [2021-07-13 20:48:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-07-13 20:48:47,992 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:48,177 INFO L225 Difference]: With dead ends: 43833 [2021-07-13 20:48:48,177 INFO L226 Difference]: Without dead ends: 43801 [2021-07-13 20:48:48,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6349 ImplicationChecksByTransitivity, 2419.8ms TimeCoverageRelationStatistics Valid=2492, Invalid=14278, Unknown=0, NotChecked=0, Total=16770 [2021-07-13 20:48:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43801 states. [2021-07-13 20:48:48,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43801 to 24220. [2021-07-13 20:48:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24220 states, 24219 states have (on average 3.4956852058301333) internal successors, (84662), 24219 states have internal predecessors, (84662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24220 states to 24220 states and 84662 transitions. [2021-07-13 20:48:48,902 INFO L78 Accepts]: Start accepts. Automaton has 24220 states and 84662 transitions. Word has length 36 [2021-07-13 20:48:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:48,902 INFO L482 AbstractCegarLoop]: Abstraction has 24220 states and 84662 transitions. [2021-07-13 20:48:48,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 24220 states and 84662 transitions. [2021-07-13 20:48:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:48,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:48,939 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:49,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:49,140 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:49,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:49,140 INFO L82 PathProgramCache]: Analyzing trace with hash -408762388, now seen corresponding path program 130 times [2021-07-13 20:48:49,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:49,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124628602] [2021-07-13 20:48:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:49,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:49,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124628602] [2021-07-13 20:48:49,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124628602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:49,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137077883] [2021-07-13 20:48:49,188 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:49,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:49,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:49,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:48:49,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:48:49,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137077883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:49,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:49,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 20:48:49,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453308614] [2021-07-13 20:48:49,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:48:49,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:48:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:48:49,341 INFO L87 Difference]: Start difference. First operand 24220 states and 84662 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:51,827 INFO L93 Difference]: Finished difference Result 58769 states and 199442 transitions. [2021-07-13 20:48:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-07-13 20:48:51,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:51,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:52,002 INFO L225 Difference]: With dead ends: 58769 [2021-07-13 20:48:52,002 INFO L226 Difference]: Without dead ends: 58705 [2021-07-13 20:48:52,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6795 ImplicationChecksByTransitivity, 1714.9ms TimeCoverageRelationStatistics Valid=2796, Invalid=13716, Unknown=0, NotChecked=0, Total=16512 [2021-07-13 20:48:52,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58705 states. [2021-07-13 20:48:53,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58705 to 25245. [2021-07-13 20:48:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25245 states, 25244 states have (on average 3.517627951196324) internal successors, (88799), 25244 states have internal predecessors, (88799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25245 states to 25245 states and 88799 transitions. [2021-07-13 20:48:53,204 INFO L78 Accepts]: Start accepts. Automaton has 25245 states and 88799 transitions. Word has length 36 [2021-07-13 20:48:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:53,205 INFO L482 AbstractCegarLoop]: Abstraction has 25245 states and 88799 transitions. [2021-07-13 20:48:53,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 25245 states and 88799 transitions. [2021-07-13 20:48:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:53,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:53,247 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:53,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-13 20:48:53,461 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1347426568, now seen corresponding path program 131 times [2021-07-13 20:48:53,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:53,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80837134] [2021-07-13 20:48:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:53,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:53,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80837134] [2021-07-13 20:48:53,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80837134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:53,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285658388] [2021-07-13 20:48:53,507 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:53,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:48:53,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:53,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:48:53,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:53,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285658388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:53,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:53,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-13 20:48:53,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263783941] [2021-07-13 20:48:53,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:48:53,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:53,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:48:53,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:48:53,698 INFO L87 Difference]: Start difference. First operand 25245 states and 88799 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:54,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:54,629 INFO L93 Difference]: Finished difference Result 57930 states and 199300 transitions. [2021-07-13 20:48:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:48:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:54,813 INFO L225 Difference]: With dead ends: 57930 [2021-07-13 20:48:54,813 INFO L226 Difference]: Without dead ends: 57930 [2021-07-13 20:48:54,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=401, Invalid=1081, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:48:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57930 states. [2021-07-13 20:48:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57930 to 26000. [2021-07-13 20:48:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26000 states, 25999 states have (on average 3.5369821916227546) internal successors, (91958), 25999 states have internal predecessors, (91958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 91958 transitions. [2021-07-13 20:48:55,933 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 91958 transitions. Word has length 36 [2021-07-13 20:48:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:55,933 INFO L482 AbstractCegarLoop]: Abstraction has 26000 states and 91958 transitions. [2021-07-13 20:48:55,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 91958 transitions. [2021-07-13 20:48:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:48:55,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:55,972 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:56,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:56,172 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:56,173 INFO L82 PathProgramCache]: Analyzing trace with hash 339853380, now seen corresponding path program 132 times [2021-07-13 20:48:56,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:56,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572170072] [2021-07-13 20:48:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:56,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:56,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572170072] [2021-07-13 20:48:56,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572170072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:56,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292179666] [2021-07-13 20:48:56,215 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:56,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:48:56,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:56,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:48:56,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:48:56,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292179666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:56,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:56,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 20:48:56,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461596503] [2021-07-13 20:48:56,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:48:56,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:48:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:48:56,383 INFO L87 Difference]: Start difference. First operand 26000 states and 91958 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:58,918 INFO L93 Difference]: Finished difference Result 60488 states and 206164 transitions. [2021-07-13 20:48:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-07-13 20:48:58,918 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:48:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:59,104 INFO L225 Difference]: With dead ends: 60488 [2021-07-13 20:48:59,104 INFO L226 Difference]: Without dead ends: 60488 [2021-07-13 20:48:59,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6645 ImplicationChecksByTransitivity, 1619.8ms TimeCoverageRelationStatistics Valid=3256, Invalid=12746, Unknown=0, NotChecked=0, Total=16002 [2021-07-13 20:48:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60488 states. [2021-07-13 20:49:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60488 to 26680. [2021-07-13 20:49:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26680 states, 26679 states have (on average 3.5661756437647587) internal successors, (95142), 26679 states have internal predecessors, (95142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26680 states to 26680 states and 95142 transitions. [2021-07-13 20:49:00,318 INFO L78 Accepts]: Start accepts. Automaton has 26680 states and 95142 transitions. Word has length 36 [2021-07-13 20:49:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:00,318 INFO L482 AbstractCegarLoop]: Abstraction has 26680 states and 95142 transitions. [2021-07-13 20:49:00,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:00,318 INFO L276 IsEmpty]: Start isEmpty. Operand 26680 states and 95142 transitions. [2021-07-13 20:49:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:00,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:00,363 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:00,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:00,564 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:00,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:00,564 INFO L82 PathProgramCache]: Analyzing trace with hash -710764454, now seen corresponding path program 133 times [2021-07-13 20:49:00,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:00,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363741993] [2021-07-13 20:49:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:00,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:00,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363741993] [2021-07-13 20:49:00,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363741993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:00,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308088332] [2021-07-13 20:49:00,606 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:00,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:00,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308088332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:00,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:00,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:49:00,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990150055] [2021-07-13 20:49:00,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:49:00,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:00,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:49:00,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:49:00,778 INFO L87 Difference]: Start difference. First operand 26680 states and 95142 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:02,529 INFO L93 Difference]: Finished difference Result 57569 states and 197823 transitions. [2021-07-13 20:49:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 20:49:02,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:02,690 INFO L225 Difference]: With dead ends: 57569 [2021-07-13 20:49:02,690 INFO L226 Difference]: Without dead ends: 57521 [2021-07-13 20:49:02,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 841.7ms TimeCoverageRelationStatistics Valid=1427, Invalid=5379, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:49:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57521 states. [2021-07-13 20:49:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57521 to 26690. [2021-07-13 20:49:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26690 states, 26689 states have (on average 3.5660009741841208) internal successors, (95173), 26689 states have internal predecessors, (95173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26690 states to 26690 states and 95173 transitions. [2021-07-13 20:49:03,891 INFO L78 Accepts]: Start accepts. Automaton has 26690 states and 95173 transitions. Word has length 36 [2021-07-13 20:49:03,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:03,891 INFO L482 AbstractCegarLoop]: Abstraction has 26690 states and 95173 transitions. [2021-07-13 20:49:03,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:03,891 INFO L276 IsEmpty]: Start isEmpty. Operand 26690 states and 95173 transitions. [2021-07-13 20:49:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:03,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:03,936 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:04,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-07-13 20:49:04,137 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash 329516758, now seen corresponding path program 134 times [2021-07-13 20:49:04,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:04,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298887008] [2021-07-13 20:49:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:04,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:04,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298887008] [2021-07-13 20:49:04,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298887008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:04,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552632352] [2021-07-13 20:49:04,178 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:04,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:04,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:49:04,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:04,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552632352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:04,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:04,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 20:49:04,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621489985] [2021-07-13 20:49:04,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:49:04,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:04,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:49:04,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:49:04,328 INFO L87 Difference]: Start difference. First operand 26690 states and 95173 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:05,259 INFO L93 Difference]: Finished difference Result 57984 states and 198618 transitions. [2021-07-13 20:49:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:49:05,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:05,472 INFO L225 Difference]: With dead ends: 57984 [2021-07-13 20:49:05,473 INFO L226 Difference]: Without dead ends: 57984 [2021-07-13 20:49:05,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1248, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:49:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57984 states. [2021-07-13 20:49:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57984 to 27762. [2021-07-13 20:49:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27762 states, 27761 states have (on average 3.5949353409459315) internal successors, (99799), 27761 states have internal predecessors, (99799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:06,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27762 states to 27762 states and 99799 transitions. [2021-07-13 20:49:06,705 INFO L78 Accepts]: Start accepts. Automaton has 27762 states and 99799 transitions. Word has length 36 [2021-07-13 20:49:06,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:06,705 INFO L482 AbstractCegarLoop]: Abstraction has 27762 states and 99799 transitions. [2021-07-13 20:49:06,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 27762 states and 99799 transitions. [2021-07-13 20:49:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:06,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:06,756 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:06,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:06,963 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:06,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1122382768, now seen corresponding path program 135 times [2021-07-13 20:49:06,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:06,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571847974] [2021-07-13 20:49:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:07,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:07,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571847974] [2021-07-13 20:49:07,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571847974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:07,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300960587] [2021-07-13 20:49:07,009 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:07,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:49:07,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:07,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:49:07,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:07,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300960587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:07,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:07,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-07-13 20:49:07,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111275847] [2021-07-13 20:49:07,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:49:07,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:07,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:49:07,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:49:07,156 INFO L87 Difference]: Start difference. First operand 27762 states and 99799 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:08,437 INFO L93 Difference]: Finished difference Result 54138 states and 184921 transitions. [2021-07-13 20:49:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:49:08,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:08,591 INFO L225 Difference]: With dead ends: 54138 [2021-07-13 20:49:08,591 INFO L226 Difference]: Without dead ends: 54066 [2021-07-13 20:49:08,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=855, Invalid=3435, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:49:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54066 states. [2021-07-13 20:49:09,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54066 to 27784. [2021-07-13 20:49:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27784 states, 27783 states have (on average 3.5943562610229276) internal successors, (99862), 27783 states have internal predecessors, (99862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27784 states to 27784 states and 99862 transitions. [2021-07-13 20:49:09,790 INFO L78 Accepts]: Start accepts. Automaton has 27784 states and 99862 transitions. Word has length 36 [2021-07-13 20:49:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:09,790 INFO L482 AbstractCegarLoop]: Abstraction has 27784 states and 99862 transitions. [2021-07-13 20:49:09,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 27784 states and 99862 transitions. [2021-07-13 20:49:09,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:09,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:09,835 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:10,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:10,036 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:10,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:10,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1700283596, now seen corresponding path program 136 times [2021-07-13 20:49:10,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:10,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037381573] [2021-07-13 20:49:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:10,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:10,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037381573] [2021-07-13 20:49:10,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037381573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:10,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272592498] [2021-07-13 20:49:10,088 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:10,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:10,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:10,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:10,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272592498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:10,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:10,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:49:10,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769058350] [2021-07-13 20:49:10,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:49:10,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:10,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:49:10,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:49:10,232 INFO L87 Difference]: Start difference. First operand 27784 states and 99862 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:12,309 INFO L93 Difference]: Finished difference Result 59804 states and 200815 transitions. [2021-07-13 20:49:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-13 20:49:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:12,500 INFO L225 Difference]: With dead ends: 59804 [2021-07-13 20:49:12,500 INFO L226 Difference]: Without dead ends: 59804 [2021-07-13 20:49:12,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5826 ImplicationChecksByTransitivity, 1289.3ms TimeCoverageRelationStatistics Valid=2466, Invalid=11576, Unknown=0, NotChecked=0, Total=14042 [2021-07-13 20:49:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59804 states. [2021-07-13 20:49:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59804 to 27938. [2021-07-13 20:49:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27938 states, 27937 states have (on average 3.5910441350180764) internal successors, (100323), 27937 states have internal predecessors, (100323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27938 states to 27938 states and 100323 transitions. [2021-07-13 20:49:13,697 INFO L78 Accepts]: Start accepts. Automaton has 27938 states and 100323 transitions. Word has length 36 [2021-07-13 20:49:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:13,697 INFO L482 AbstractCegarLoop]: Abstraction has 27938 states and 100323 transitions. [2021-07-13 20:49:13,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand 27938 states and 100323 transitions. [2021-07-13 20:49:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:13,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:13,743 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:13,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-13 20:49:13,943 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:13,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2038937164, now seen corresponding path program 137 times [2021-07-13 20:49:13,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:13,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151784617] [2021-07-13 20:49:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:14,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:14,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151784617] [2021-07-13 20:49:14,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151784617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:14,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699481504] [2021-07-13 20:49:14,004 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:14,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:49:14,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:14,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:49:14,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:14,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699481504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:14,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:14,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-07-13 20:49:14,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126737494] [2021-07-13 20:49:14,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:49:14,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:14,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:49:14,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:49:14,138 INFO L87 Difference]: Start difference. First operand 27938 states and 100323 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:15,484 INFO L93 Difference]: Finished difference Result 55738 states and 189163 transitions. [2021-07-13 20:49:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:49:15,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:15,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:15,641 INFO L225 Difference]: With dead ends: 55738 [2021-07-13 20:49:15,641 INFO L226 Difference]: Without dead ends: 55594 [2021-07-13 20:49:15,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 702.9ms TimeCoverageRelationStatistics Valid=1122, Invalid=4884, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:49:15,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55594 states. [2021-07-13 20:49:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55594 to 27966. [2021-07-13 20:49:16,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27966 states, 27965 states have (on average 3.5902377972465582) internal successors, (100401), 27965 states have internal predecessors, (100401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27966 states to 27966 states and 100401 transitions. [2021-07-13 20:49:16,903 INFO L78 Accepts]: Start accepts. Automaton has 27966 states and 100401 transitions. Word has length 36 [2021-07-13 20:49:16,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:16,903 INFO L482 AbstractCegarLoop]: Abstraction has 27966 states and 100401 transitions. [2021-07-13 20:49:16,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 27966 states and 100401 transitions. [2021-07-13 20:49:16,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:16,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:16,947 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:17,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-13 20:49:17,148 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:17,148 INFO L82 PathProgramCache]: Analyzing trace with hash -201981896, now seen corresponding path program 138 times [2021-07-13 20:49:17,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:17,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455291152] [2021-07-13 20:49:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:17,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:17,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455291152] [2021-07-13 20:49:17,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455291152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:17,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703029294] [2021-07-13 20:49:17,199 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:17,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:49:17,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:17,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703029294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:17,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:17,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 20:49:17,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931108244] [2021-07-13 20:49:17,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:49:17,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:17,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:49:17,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:49:17,339 INFO L87 Difference]: Start difference. First operand 27966 states and 100401 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:19,098 INFO L93 Difference]: Finished difference Result 58306 states and 196728 transitions. [2021-07-13 20:49:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-13 20:49:19,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:19,273 INFO L225 Difference]: With dead ends: 58306 [2021-07-13 20:49:19,273 INFO L226 Difference]: Without dead ends: 58238 [2021-07-13 20:49:19,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 1128.8ms TimeCoverageRelationStatistics Valid=1816, Invalid=7886, Unknown=0, NotChecked=0, Total=9702 [2021-07-13 20:49:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58238 states. [2021-07-13 20:49:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58238 to 28222. [2021-07-13 20:49:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28222 states, 28221 states have (on average 3.5836788207363313) internal successors, (101135), 28221 states have internal predecessors, (101135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28222 states to 28222 states and 101135 transitions. [2021-07-13 20:49:20,476 INFO L78 Accepts]: Start accepts. Automaton has 28222 states and 101135 transitions. Word has length 36 [2021-07-13 20:49:20,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:20,476 INFO L482 AbstractCegarLoop]: Abstraction has 28222 states and 101135 transitions. [2021-07-13 20:49:20,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:20,476 INFO L276 IsEmpty]: Start isEmpty. Operand 28222 states and 101135 transitions. [2021-07-13 20:49:20,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:20,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:20,534 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:20,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-13 20:49:20,735 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:20,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:20,735 INFO L82 PathProgramCache]: Analyzing trace with hash 838299316, now seen corresponding path program 139 times [2021-07-13 20:49:20,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:20,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427299140] [2021-07-13 20:49:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:20,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:20,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427299140] [2021-07-13 20:49:20,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427299140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:20,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512433723] [2021-07-13 20:49:20,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:20,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:49:20,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:20,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512433723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:20,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:20,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-07-13 20:49:20,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271667829] [2021-07-13 20:49:20,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:49:20,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:49:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:49:20,929 INFO L87 Difference]: Start difference. First operand 28222 states and 101135 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:22,152 INFO L93 Difference]: Finished difference Result 58747 states and 196828 transitions. [2021-07-13 20:49:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:49:22,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:22,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:22,485 INFO L225 Difference]: With dead ends: 58747 [2021-07-13 20:49:22,485 INFO L226 Difference]: Without dead ends: 58747 [2021-07-13 20:49:22,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=896, Invalid=2886, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:49:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58747 states. [2021-07-13 20:49:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58747 to 28292. [2021-07-13 20:49:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28292 states, 28291 states have (on average 3.583259693895585) internal successors, (101374), 28291 states have internal predecessors, (101374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28292 states to 28292 states and 101374 transitions. [2021-07-13 20:49:23,571 INFO L78 Accepts]: Start accepts. Automaton has 28292 states and 101374 transitions. Word has length 36 [2021-07-13 20:49:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:23,571 INFO L482 AbstractCegarLoop]: Abstraction has 28292 states and 101374 transitions. [2021-07-13 20:49:23,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:23,571 INFO L276 IsEmpty]: Start isEmpty. Operand 28292 states and 101374 transitions. [2021-07-13 20:49:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:23,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:23,618 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:23,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:23,819 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:23,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:23,819 INFO L82 PathProgramCache]: Analyzing trace with hash 769453752, now seen corresponding path program 140 times [2021-07-13 20:49:23,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:23,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662048619] [2021-07-13 20:49:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:23,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:23,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662048619] [2021-07-13 20:49:23,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662048619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:23,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800195098] [2021-07-13 20:49:23,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:23,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:23,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:23,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:24,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800195098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:24,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:24,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-07-13 20:49:24,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137015024] [2021-07-13 20:49:24,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:49:24,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:24,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:49:24,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:49:24,004 INFO L87 Difference]: Start difference. First operand 28292 states and 101374 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:25,871 INFO L93 Difference]: Finished difference Result 58143 states and 196081 transitions. [2021-07-13 20:49:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-13 20:49:25,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:26,096 INFO L225 Difference]: With dead ends: 58143 [2021-07-13 20:49:26,096 INFO L226 Difference]: Without dead ends: 57927 [2021-07-13 20:49:26,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 920.0ms TimeCoverageRelationStatistics Valid=1531, Invalid=7211, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:49:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57927 states. [2021-07-13 20:49:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57927 to 28406. [2021-07-13 20:49:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28406 states, 28405 states have (on average 3.5803907762717833) internal successors, (101701), 28405 states have internal predecessors, (101701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28406 states to 28406 states and 101701 transitions. [2021-07-13 20:49:27,262 INFO L78 Accepts]: Start accepts. Automaton has 28406 states and 101701 transitions. Word has length 36 [2021-07-13 20:49:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:27,262 INFO L482 AbstractCegarLoop]: Abstraction has 28406 states and 101701 transitions. [2021-07-13 20:49:27,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 28406 states and 101701 transitions. [2021-07-13 20:49:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:27,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:27,311 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:27,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-13 20:49:27,512 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:27,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:27,513 INFO L82 PathProgramCache]: Analyzing trace with hash 851907644, now seen corresponding path program 141 times [2021-07-13 20:49:27,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:27,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729903536] [2021-07-13 20:49:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:27,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:27,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729903536] [2021-07-13 20:49:27,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729903536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:27,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108895070] [2021-07-13 20:49:27,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:27,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:49:27,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:27,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:49:27,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:27,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108895070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:27,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:27,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-07-13 20:49:27,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353718043] [2021-07-13 20:49:27,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:49:27,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:27,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:49:27,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:49:27,686 INFO L87 Difference]: Start difference. First operand 28406 states and 101701 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:29,536 INFO L93 Difference]: Finished difference Result 56244 states and 191794 transitions. [2021-07-13 20:49:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-13 20:49:29,536 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:29,700 INFO L225 Difference]: With dead ends: 56244 [2021-07-13 20:49:29,700 INFO L226 Difference]: Without dead ends: 56088 [2021-07-13 20:49:29,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 990.8ms TimeCoverageRelationStatistics Valid=1746, Invalid=8154, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:49:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56088 states. [2021-07-13 20:49:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56088 to 28858. [2021-07-13 20:49:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28858 states, 28857 states have (on average 3.5620819905049035) internal successors, (102791), 28857 states have internal predecessors, (102791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28858 states to 28858 states and 102791 transitions. [2021-07-13 20:49:30,826 INFO L78 Accepts]: Start accepts. Automaton has 28858 states and 102791 transitions. Word has length 36 [2021-07-13 20:49:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:30,827 INFO L482 AbstractCegarLoop]: Abstraction has 28858 states and 102791 transitions. [2021-07-13 20:49:30,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:30,827 INFO L276 IsEmpty]: Start isEmpty. Operand 28858 states and 102791 transitions. [2021-07-13 20:49:30,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:30,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:30,877 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:31,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:31,077 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:31,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1657232324, now seen corresponding path program 142 times [2021-07-13 20:49:31,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:31,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895549652] [2021-07-13 20:49:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:31,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:31,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895549652] [2021-07-13 20:49:31,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895549652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:31,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131502829] [2021-07-13 20:49:31,141 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:31,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:31,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:31,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:31,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:31,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131502829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:31,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:31,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:49:31,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624802149] [2021-07-13 20:49:31,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:49:31,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:31,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:49:31,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:49:31,270 INFO L87 Difference]: Start difference. First operand 28858 states and 102791 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:34,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:34,245 INFO L93 Difference]: Finished difference Result 62328 states and 208262 transitions. [2021-07-13 20:49:34,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-07-13 20:49:34,245 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:34,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:34,433 INFO L225 Difference]: With dead ends: 62328 [2021-07-13 20:49:34,433 INFO L226 Difference]: Without dead ends: 62328 [2021-07-13 20:49:34,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10889 ImplicationChecksByTransitivity, 1911.8ms TimeCoverageRelationStatistics Valid=4101, Invalid=20705, Unknown=0, NotChecked=0, Total=24806 [2021-07-13 20:49:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62328 states. [2021-07-13 20:49:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62328 to 31970. [2021-07-13 20:49:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31970 states, 31969 states have (on average 3.5039882386061496) internal successors, (112019), 31969 states have internal predecessors, (112019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31970 states to 31970 states and 112019 transitions. [2021-07-13 20:49:35,600 INFO L78 Accepts]: Start accepts. Automaton has 31970 states and 112019 transitions. Word has length 36 [2021-07-13 20:49:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:35,600 INFO L482 AbstractCegarLoop]: Abstraction has 31970 states and 112019 transitions. [2021-07-13 20:49:35,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:35,601 INFO L276 IsEmpty]: Start isEmpty. Operand 31970 states and 112019 transitions. [2021-07-13 20:49:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:35,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:35,821 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:36,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:36,036 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:36,036 INFO L82 PathProgramCache]: Analyzing trace with hash 894177490, now seen corresponding path program 143 times [2021-07-13 20:49:36,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:36,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565515079] [2021-07-13 20:49:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:36,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:36,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565515079] [2021-07-13 20:49:36,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565515079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:36,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681801808] [2021-07-13 20:49:36,092 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:36,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:49:36,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:36,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:36,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:36,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681801808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:36,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:36,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:49:36,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751445355] [2021-07-13 20:49:36,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:49:36,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:49:36,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:49:36,255 INFO L87 Difference]: Start difference. First operand 31970 states and 112019 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:37,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:37,896 INFO L93 Difference]: Finished difference Result 58961 states and 202100 transitions. [2021-07-13 20:49:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:49:37,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:37,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:38,188 INFO L225 Difference]: With dead ends: 58961 [2021-07-13 20:49:38,188 INFO L226 Difference]: Without dead ends: 58937 [2021-07-13 20:49:38,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 1022.3ms TimeCoverageRelationStatistics Valid=1411, Invalid=5561, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:49:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58937 states. [2021-07-13 20:49:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58937 to 33178. [2021-07-13 20:49:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33178 states, 33177 states have (on average 3.5047774060343007) internal successors, (116278), 33177 states have internal predecessors, (116278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33178 states to 33178 states and 116278 transitions. [2021-07-13 20:49:39,295 INFO L78 Accepts]: Start accepts. Automaton has 33178 states and 116278 transitions. Word has length 36 [2021-07-13 20:49:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:39,295 INFO L482 AbstractCegarLoop]: Abstraction has 33178 states and 116278 transitions. [2021-07-13 20:49:39,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 33178 states and 116278 transitions. [2021-07-13 20:49:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:39,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:39,347 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:39,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:39,548 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:39,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1472010922, now seen corresponding path program 144 times [2021-07-13 20:49:39,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:39,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502708299] [2021-07-13 20:49:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:39,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:39,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502708299] [2021-07-13 20:49:39,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502708299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:39,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165537191] [2021-07-13 20:49:39,591 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:39,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:49:39,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:39,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:49:39,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:39,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165537191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:39,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:39,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:49:39,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844767639] [2021-07-13 20:49:39,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:49:39,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:39,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:49:39,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:49:39,739 INFO L87 Difference]: Start difference. First operand 33178 states and 116278 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:41,463 INFO L93 Difference]: Finished difference Result 61380 states and 207685 transitions. [2021-07-13 20:49:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:49:41,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:41,636 INFO L225 Difference]: With dead ends: 61380 [2021-07-13 20:49:41,637 INFO L226 Difference]: Without dead ends: 61356 [2021-07-13 20:49:41,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 803.4ms TimeCoverageRelationStatistics Valid=1508, Invalid=5464, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:49:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61356 states. [2021-07-13 20:49:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61356 to 33587. [2021-07-13 20:49:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33587 states, 33586 states have (on average 3.5085750014887154) internal successors, (117839), 33586 states have internal predecessors, (117839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33587 states to 33587 states and 117839 transitions. [2021-07-13 20:49:42,806 INFO L78 Accepts]: Start accepts. Automaton has 33587 states and 117839 transitions. Word has length 36 [2021-07-13 20:49:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:42,806 INFO L482 AbstractCegarLoop]: Abstraction has 33587 states and 117839 transitions. [2021-07-13 20:49:42,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:42,807 INFO L276 IsEmpty]: Start isEmpty. Operand 33587 states and 117839 transitions. [2021-07-13 20:49:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:42,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:42,860 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:43,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:43,060 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:43,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:43,061 INFO L82 PathProgramCache]: Analyzing trace with hash 44374, now seen corresponding path program 145 times [2021-07-13 20:49:43,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:43,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056599766] [2021-07-13 20:49:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:43,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:43,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056599766] [2021-07-13 20:49:43,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056599766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:43,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440445992] [2021-07-13 20:49:43,107 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:43,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:43,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440445992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:43,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:43,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 20:49:43,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559389207] [2021-07-13 20:49:43,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:49:43,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:43,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:49:43,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:49:43,261 INFO L87 Difference]: Start difference. First operand 33587 states and 117839 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,898 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-07-13 20:49:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:45,474 INFO L93 Difference]: Finished difference Result 68170 states and 230143 transitions. [2021-07-13 20:49:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-07-13 20:49:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:45,673 INFO L225 Difference]: With dead ends: 68170 [2021-07-13 20:49:45,674 INFO L226 Difference]: Without dead ends: 68134 [2021-07-13 20:49:45,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 1363.2ms TimeCoverageRelationStatistics Valid=2536, Invalid=9236, Unknown=0, NotChecked=0, Total=11772 [2021-07-13 20:49:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68134 states. [2021-07-13 20:49:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68134 to 33436. [2021-07-13 20:49:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33436 states, 33435 states have (on average 3.5040526394496783) internal successors, (117158), 33435 states have internal predecessors, (117158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33436 states to 33436 states and 117158 transitions. [2021-07-13 20:49:47,116 INFO L78 Accepts]: Start accepts. Automaton has 33436 states and 117158 transitions. Word has length 36 [2021-07-13 20:49:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:47,116 INFO L482 AbstractCegarLoop]: Abstraction has 33436 states and 117158 transitions. [2021-07-13 20:49:47,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 33436 states and 117158 transitions. [2021-07-13 20:49:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:47,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:47,180 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:47,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-07-13 20:49:47,381 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:47,381 INFO L82 PathProgramCache]: Analyzing trace with hash -988740176, now seen corresponding path program 146 times [2021-07-13 20:49:47,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:47,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069660690] [2021-07-13 20:49:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:47,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:47,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069660690] [2021-07-13 20:49:47,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069660690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:47,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967034315] [2021-07-13 20:49:47,444 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:47,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:47,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:47,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:47,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:47,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967034315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:47,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:47,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:49:47,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303431640] [2021-07-13 20:49:47,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:49:47,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:47,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:49:47,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:49:47,603 INFO L87 Difference]: Start difference. First operand 33436 states and 117158 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:49,360 INFO L93 Difference]: Finished difference Result 71028 states and 243828 transitions. [2021-07-13 20:49:49,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:49:49,360 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:49,722 INFO L225 Difference]: With dead ends: 71028 [2021-07-13 20:49:49,722 INFO L226 Difference]: Without dead ends: 70956 [2021-07-13 20:49:49,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 964.7ms TimeCoverageRelationStatistics Valid=1558, Invalid=7184, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:49:49,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70956 states. [2021-07-13 20:49:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70956 to 33879. [2021-07-13 20:49:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33879 states, 33878 states have (on average 3.507792667808017) internal successors, (118837), 33878 states have internal predecessors, (118837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33879 states to 33879 states and 118837 transitions. [2021-07-13 20:49:51,095 INFO L78 Accepts]: Start accepts. Automaton has 33879 states and 118837 transitions. Word has length 36 [2021-07-13 20:49:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:51,096 INFO L482 AbstractCegarLoop]: Abstraction has 33879 states and 118837 transitions. [2021-07-13 20:49:51,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 33879 states and 118837 transitions. [2021-07-13 20:49:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:51,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:51,153 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:51,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-07-13 20:49:51,354 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:51,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:51,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1272413260, now seen corresponding path program 147 times [2021-07-13 20:49:51,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:51,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811543771] [2021-07-13 20:49:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:51,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:51,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811543771] [2021-07-13 20:49:51,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811543771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:51,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007567941] [2021-07-13 20:49:51,413 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:51,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:49:51,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:51,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:49:51,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:51,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007567941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:51,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:51,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 20:49:51,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268185285] [2021-07-13 20:49:51,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:49:51,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:51,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:49:51,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:49:51,550 INFO L87 Difference]: Start difference. First operand 33879 states and 118837 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:53,502 INFO L93 Difference]: Finished difference Result 72468 states and 247783 transitions. [2021-07-13 20:49:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-13 20:49:53,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:53,722 INFO L225 Difference]: With dead ends: 72468 [2021-07-13 20:49:53,723 INFO L226 Difference]: Without dead ends: 72348 [2021-07-13 20:49:53,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 1090.1ms TimeCoverageRelationStatistics Valid=1503, Invalid=6869, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:49:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72348 states. [2021-07-13 20:49:55,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72348 to 36408. [2021-07-13 20:49:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36408 states, 36407 states have (on average 3.501606833850633) internal successors, (127483), 36407 states have internal predecessors, (127483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36408 states to 36408 states and 127483 transitions. [2021-07-13 20:49:55,278 INFO L78 Accepts]: Start accepts. Automaton has 36408 states and 127483 transitions. Word has length 36 [2021-07-13 20:49:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:55,278 INFO L482 AbstractCegarLoop]: Abstraction has 36408 states and 127483 transitions. [2021-07-13 20:49:55,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 36408 states and 127483 transitions. [2021-07-13 20:49:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:55,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:55,342 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:55,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-13 20:49:55,542 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:55,542 INFO L82 PathProgramCache]: Analyzing trace with hash 995659960, now seen corresponding path program 148 times [2021-07-13 20:49:55,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:55,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936749978] [2021-07-13 20:49:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:55,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:55,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936749978] [2021-07-13 20:49:55,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936749978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:55,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137707618] [2021-07-13 20:49:55,606 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:55,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:55,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:55,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:55,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:55,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137707618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:55,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:55,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:49:55,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955875057] [2021-07-13 20:49:55,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:49:55,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:55,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:49:55,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:49:55,728 INFO L87 Difference]: Start difference. First operand 36408 states and 127483 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:56,536 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-07-13 20:49:57,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:57,451 INFO L93 Difference]: Finished difference Result 71896 states and 245531 transitions. [2021-07-13 20:49:57,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:49:57,451 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:49:57,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:57,837 INFO L225 Difference]: With dead ends: 71896 [2021-07-13 20:49:57,837 INFO L226 Difference]: Without dead ends: 71728 [2021-07-13 20:49:57,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2683 ImplicationChecksByTransitivity, 990.4ms TimeCoverageRelationStatistics Valid=1382, Invalid=6274, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:49:57,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71728 states. [2021-07-13 20:49:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71728 to 37315. [2021-07-13 20:49:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37315 states, 37314 states have (on average 3.4974272391059658) internal successors, (130503), 37314 states have internal predecessors, (130503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37315 states to 37315 states and 130503 transitions. [2021-07-13 20:49:59,234 INFO L78 Accepts]: Start accepts. Automaton has 37315 states and 130503 transitions. Word has length 36 [2021-07-13 20:49:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:59,235 INFO L482 AbstractCegarLoop]: Abstraction has 37315 states and 130503 transitions. [2021-07-13 20:49:59,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:59,235 INFO L276 IsEmpty]: Start isEmpty. Operand 37315 states and 130503 transitions. [2021-07-13 20:49:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:49:59,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:59,294 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:59,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-13 20:49:59,494 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash 652323388, now seen corresponding path program 149 times [2021-07-13 20:49:59,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:59,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058357143] [2021-07-13 20:49:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:59,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:59,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058357143] [2021-07-13 20:49:59,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058357143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:59,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295777099] [2021-07-13 20:49:59,544 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:59,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:49:59,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:59,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:49:59,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:59,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295777099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:59,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:59,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:49:59,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256477582] [2021-07-13 20:49:59,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:49:59,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:59,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:49:59,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:49:59,688 INFO L87 Difference]: Start difference. First operand 37315 states and 130503 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:02,012 INFO L93 Difference]: Finished difference Result 70630 states and 238604 transitions. [2021-07-13 20:50:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-13 20:50:02,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:50:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:02,276 INFO L225 Difference]: With dead ends: 70630 [2021-07-13 20:50:02,277 INFO L226 Difference]: Without dead ends: 70602 [2021-07-13 20:50:02,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 1130.8ms TimeCoverageRelationStatistics Valid=2360, Invalid=8770, Unknown=0, NotChecked=0, Total=11130 [2021-07-13 20:50:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70602 states. [2021-07-13 20:50:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70602 to 37553. [2021-07-13 20:50:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37553 states, 37552 states have (on average 3.4914518534299104) internal successors, (131111), 37552 states have internal predecessors, (131111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37553 states to 37553 states and 131111 transitions. [2021-07-13 20:50:03,901 INFO L78 Accepts]: Start accepts. Automaton has 37553 states and 131111 transitions. Word has length 36 [2021-07-13 20:50:03,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:03,901 INFO L482 AbstractCegarLoop]: Abstraction has 37553 states and 131111 transitions. [2021-07-13 20:50:03,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand 37553 states and 131111 transitions. [2021-07-13 20:50:03,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:50:03,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:03,972 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:04,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:04,173 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1629303304, now seen corresponding path program 150 times [2021-07-13 20:50:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:04,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952604227] [2021-07-13 20:50:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:04,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:04,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952604227] [2021-07-13 20:50:04,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952604227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:04,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237513339] [2021-07-13 20:50:04,224 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:04,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:50:04,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:04,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:50:04,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:04,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237513339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:04,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:04,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-07-13 20:50:04,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906790437] [2021-07-13 20:50:04,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:50:04,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:04,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:50:04,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:50:04,357 INFO L87 Difference]: Start difference. First operand 37553 states and 131111 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:04,891 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 20:50:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:06,246 INFO L93 Difference]: Finished difference Result 64800 states and 219489 transitions. [2021-07-13 20:50:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:50:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:50:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:06,473 INFO L225 Difference]: With dead ends: 64800 [2021-07-13 20:50:06,474 INFO L226 Difference]: Without dead ends: 64752 [2021-07-13 20:50:06,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2640 ImplicationChecksByTransitivity, 1017.4ms TimeCoverageRelationStatistics Valid=1456, Invalid=5854, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:50:06,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64752 states. [2021-07-13 20:50:07,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64752 to 38003. [2021-07-13 20:50:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38003 states, 38002 states have (on average 3.4817641176780167) internal successors, (132314), 38002 states have internal predecessors, (132314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38003 states to 38003 states and 132314 transitions. [2021-07-13 20:50:07,954 INFO L78 Accepts]: Start accepts. Automaton has 38003 states and 132314 transitions. Word has length 36 [2021-07-13 20:50:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:07,954 INFO L482 AbstractCegarLoop]: Abstraction has 38003 states and 132314 transitions. [2021-07-13 20:50:07,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 38003 states and 132314 transitions. [2021-07-13 20:50:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:50:08,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:08,021 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:08,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:08,221 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:08,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash -971366648, now seen corresponding path program 151 times [2021-07-13 20:50:08,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:08,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072302438] [2021-07-13 20:50:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:08,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:08,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072302438] [2021-07-13 20:50:08,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072302438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:08,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274870210] [2021-07-13 20:50:08,278 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:08,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:50:08,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:50:08,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274870210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:08,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:08,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 20:50:08,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532437190] [2021-07-13 20:50:08,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:50:08,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:08,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:50:08,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:50:08,395 INFO L87 Difference]: Start difference. First operand 38003 states and 132314 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:09,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:09,809 INFO L93 Difference]: Finished difference Result 62672 states and 214949 transitions. [2021-07-13 20:50:09,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:50:09,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:50:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:10,196 INFO L225 Difference]: With dead ends: 62672 [2021-07-13 20:50:10,196 INFO L226 Difference]: Without dead ends: 62612 [2021-07-13 20:50:10,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=939, Invalid=3891, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:50:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62612 states. [2021-07-13 20:50:11,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62612 to 38019. [2021-07-13 20:50:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38019 states, 38018 states have (on average 3.4814561523488874) internal successors, (132358), 38018 states have internal predecessors, (132358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38019 states to 38019 states and 132358 transitions. [2021-07-13 20:50:11,526 INFO L78 Accepts]: Start accepts. Automaton has 38019 states and 132358 transitions. Word has length 36 [2021-07-13 20:50:11,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:11,527 INFO L482 AbstractCegarLoop]: Abstraction has 38019 states and 132358 transitions. [2021-07-13 20:50:11,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 38019 states and 132358 transitions. [2021-07-13 20:50:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:50:11,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:11,594 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:11,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:11,809 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:11,809 INFO L82 PathProgramCache]: Analyzing trace with hash 613711262, now seen corresponding path program 152 times [2021-07-13 20:50:11,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:11,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377932957] [2021-07-13 20:50:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:11,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:11,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377932957] [2021-07-13 20:50:11,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377932957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:11,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159168444] [2021-07-13 20:50:11,862 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:11,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:50:11,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:11,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:50:11,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:50:11,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159168444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:11,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:11,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-07-13 20:50:11,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778493836] [2021-07-13 20:50:11,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:11,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:11,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:11,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:11,962 INFO L87 Difference]: Start difference. First operand 38019 states and 132358 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:13,849 INFO L93 Difference]: Finished difference Result 63919 states and 217939 transitions. [2021-07-13 20:50:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-13 20:50:13,849 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:50:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:14,089 INFO L225 Difference]: With dead ends: 63919 [2021-07-13 20:50:14,089 INFO L226 Difference]: Without dead ends: 63879 [2021-07-13 20:50:14,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 883.2ms TimeCoverageRelationStatistics Valid=1540, Invalid=6470, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:50:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63879 states. [2021-07-13 20:50:15,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63879 to 38411. [2021-07-13 20:50:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38411 states, 38410 states have (on average 3.478104660244728) internal successors, (133594), 38410 states have internal predecessors, (133594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38411 states to 38411 states and 133594 transitions. [2021-07-13 20:50:15,548 INFO L78 Accepts]: Start accepts. Automaton has 38411 states and 133594 transitions. Word has length 36 [2021-07-13 20:50:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:15,548 INFO L482 AbstractCegarLoop]: Abstraction has 38411 states and 133594 transitions. [2021-07-13 20:50:15,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 38411 states and 133594 transitions. [2021-07-13 20:50:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:50:15,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:15,614 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:15,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-07-13 20:50:15,815 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:15,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:15,815 INFO L82 PathProgramCache]: Analyzing trace with hash -544224248, now seen corresponding path program 153 times [2021-07-13 20:50:15,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:15,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252462751] [2021-07-13 20:50:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:15,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:15,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252462751] [2021-07-13 20:50:15,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252462751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:15,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602715589] [2021-07-13 20:50:15,874 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:15,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:50:15,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:15,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:50:15,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:15,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602715589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:15,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:15,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-07-13 20:50:15,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695205860] [2021-07-13 20:50:15,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:50:15,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:15,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:50:15,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:50:15,985 INFO L87 Difference]: Start difference. First operand 38411 states and 133594 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:16,351 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-07-13 20:50:17,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:17,922 INFO L93 Difference]: Finished difference Result 65073 states and 222032 transitions. [2021-07-13 20:50:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:50:17,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:50:17,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:18,139 INFO L225 Difference]: With dead ends: 65073 [2021-07-13 20:50:18,140 INFO L226 Difference]: Without dead ends: 64989 [2021-07-13 20:50:18,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 1190.9ms TimeCoverageRelationStatistics Valid=1344, Invalid=6138, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:50:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64989 states.